When I'm on the internet, I usually try not to be a "grammar Nazi," as the kids like to call them. But there's one thing, that no matter how many times I see, it ALWAYS makes me angry. And what is this, you ask? 
 
Well, it's when people use the word "then" when they really mean "than." For example: 
 
Incorrect: I like this game more then that other game.  
Correct: I like this game more than that other game. 
 
Incorrect: There are more dogs then cats.  
Correct: There are more dogs than cats.  
 
Then is used in the context of time. I went to the park, and then I saw some dogs. You turn the car on, then you drive.  
 
Than is used when comparing things. Pizza is better than broccoli. I'd rather eat broccoli (which I hate) than read people miss use the word then.  
 
So, my question is, WHAT IS WRONG WITH YOU PEOPLE?! Did you not pay ANY attention during English class in school? Do you just not care? Just typing fast, push the wrong button, and you don't take the time to make sure you used the correct word?  
 
And I CAN'T take it. All it does is make the writer look like an idiot for not knowing the proper grammar, or for not caring.  
 
Now, I'm not going try and say that I use proper grammar all the time, but I don't do anything as glaringly wrong as that (at least I don't think I do).  
 
Anyway, does anyone else get this angry over stupid little things on the internet like this? 

There are few things I hate more than bad grammar and spelling.

I'm not a native English speaker and even I get frustrated at all the incorrect uses of certain words.

Dood chillax. Peeps be talking like broskis on here. As long as we feel you, it's all good in the hood.

I'm typing this sentence at 80 words per minute and I am not going to make any mistakes. I'm going to tell you that I did not pay any attention in English class because I much prefer things like numbers in Math class than all the words in English.

There are few things less important then people using then instead of than. Unless you have some sort of compulsive disorder, you should really get your priorities straight. It can't be healthy to be get so angry at a different letter being used.

Be sure to take into account that not everyone's first language is English, either. I'm not saying you do, but I see a lot of posters making this assumption.
  
I don't get bothered by a person's writing ability as long as I'm able to understand what they're saying. 
 
Edit: A lot of missed opportunities by the previous posters above to jokingly misuse then/than! :(

People actually get them mixed up? Guess I've had the luck of never having to see it before.
I mean, that kinda thing doesn't really get to me but it sounds like a really basic thing to mess up. I suppose I'm a native english speaker though.

What annoys me is when people say "I could care less". That means you do care, because you could care less than you currently do. They should say "I couldn't care less", because that means you don't care, because you can't care any less than you do. The then & than thing often comes from english not being their first language, but more often than not, it's Americans who say "I could care less".

First you calm down, than I use correct grammar.

I don't think I've seen many uses of this. It probably happens less then you think.

" There are few things I hate more then bad grammar and spelling. "

I hate it when people use "your" the wrong way. 

" First you calm down, than I use correct grammar. "

" @AlexW00d said:

" There are few things I hate more then bad grammar and spelling. "

"

Improper usage of apostrophes gets on my nerves a lot more than any other grammatical error.

" @AlexW00d said:

" There are few thongs I hate more then bad grammar and spelling. "

"

" First you calm down, than I use correct grammar. "

@Chabbs0 said:

" @AlexW00d said:

" There are few things I hate more then bad grammar and spelling. "

"

I'm not sure if you're intentionally making his post incorrect or not, but just in case, "than" was indeed correct. "

"I could care less" and the incorrect use of "then" is one of the few things I hate about children on the internet too

" "I could care less" and the incorrect use of "then" is one of the few things I hate about children on the internet too "

" @ZeForgotten said:

" "I could care less" and the incorrect use of "then" is one of the few things I hate about children on the internet too "

Don't you mean "are," instead of "is," because you're talking about two different things there, which means you're talking in plural-ness, and blah blah BLAH! "

" @Axxol: Sadly, we will never know.  If only Chabbs was still with us today. ;_; "

sometimes i like to type like this when im trying to get a certain tone across though i dont think most people hear the voice i hear when i do it

I hvee nveer utdorsneod gmamrar nizas. I tned to raed the wdros as a wlohe and not ecah ivdunidial lteter.

The use of "have" and "of" also causes anger to some.

" I hvee nveer utdorsneod gmamrar nizas. I tned to raed the wdros as a wlohe and not ecah ivdunidial lteter. "

This is only tangentially related, but I hate when people think Frankenstein was the monster. It wasn't. Frankenstein is the doctor; the monster has no name, and this is a major plot point. GET IT RIGHT!

" sometimes i like to type like this when im trying to get a certain tone across though i dont think most people hear the voice i hear when i do it "

" This is only tangentially related, but I hate when people think Frankenstein was the monster. It wasn't. Frankenstein is the doctor; the monster has no name, and this is a major plot point. GET IT RIGHT! "

" @Vito_Raliffe said:

" sometimes i like to type like this when im trying to get a certain tone across though i dont think most people hear the voice i hear when i do it "

Stop yelling and being angry!  Geesh "

" This is only tangentially related, but I hate when people think Frankenstein was the monster. It wasn't. Frankenstein is the doctor; the monster has no name, and this is a major plot point. GET IT RIGHT! "

" @ZeForgotten said:

" @Vito_Raliffe said:

" sometimes i like to type like this when im trying to get a certain tone across though i dont think most people hear the voice i hear when i do it "

Stop yelling and being angry!  Geesh "

THIS IS MY QUIET VOICE IS THIS BETTER FOR YOU  Edit: ok bed timez "

There/Their/They're
Your/You're
Bare/Bear  
mind/mine
People who don't know how to use plurals. 
 
One of the things a family member of mine (who's over 40 years old, mind you) does that bugs the living shit out of me though is that instead of typing the word "and" it's always ~n~.  I mean really?  It's the same fucking amount of characters.  In fact, you have to hold down the shift to get the tilde.  So there's no "it's shorter to type that way."  
Other such crap that's not any shorter to type but is done because it's "cool" bugs me too, especially from middle-aged folk who should be past worrying about fitting in with their kids.

I'm personally more annoyed by the misuse of their, there, and they're.

" I'm not a native English speaker and even I get frustrated at all the incorrect uses of certain words. "

ATM Machine is redundant!! Your saying Automated Teller Machine Machine! gah...

Does it matter? As long as the person is understandable it shouldn't matter at all.

" ATM Machine is redundant!! Your saying Automated Teller Machine Machine! gah... "

I hate it when people say 'supposably'. 
I really, truly hate it when people are too dumb to tell the difference between 'no' and 'know'. I've seen that way too frequently on YouTube. 
Nobody seems to know when to use the word 'they're', as it's almost always replaced with 'their', or vice versa. 
People seem to always use apostrophes in the wrong places. 
While we're on a similar subject, I hate things like 'lol', 'lmao', and just generally all emoticons. If it's not worth it to type it all out, it's not worth saying.

If you can't bare them, their you're problems.

" What annoys me is when people say "I could care less". That means you do care, because you could care less than you currently do. They should say "I couldn't care less", because that means you don't care, because you can't care any less than you do. The then & than thing often comes from english not being their first language, but more often than not, it's Americans who say "I could care less". "

I also hate when people write "I could care less", which is completely inappropriate and makes me want to puch people.

Screw people who call you a grammar natzi. I can understand simple mistakes made on a qick comment. That's just being in a hurry. But if the person is being a d-bag and continues making the same mistakes on comment after comment, I am all for calling that person the idiot they are.