@cornbredx: I do constantly. I wish I could report people before the match started, too; listening to 3 people demand to play mid and refuse to change roles gets eye-twitching, and I'd like to do more than just mash Force Quit.
(I could play solely via the Team Builder, but unless I'm support or jungle it takes a long time to form up. And that only takes care of the issues before the game.)
I've occasionally tried grouping with friends, but (and this may be a problem unique to LoL's matchmaking) we seem to often get matched against premade groups that beat the tar out of our "casual" group. I used to find that annoying, but lately I've been debating whether I'd rather play solely with friends instead, losses be damned.
Why do all these AAA companies insist on releasing a new sequel every year? Not even movies hold that tight of a schedule, and they're easier to make than games. Can't they just stick to a 2-year schedule?