@donmfjohnson: There's no penalty to unplugging the internet, or even turning off your PS3 (Although you run the risk of corrupting your save). I did it a lot when I played the final parts of DeS and nothing bad happened.
I haven't seen the latest episode (Just finished part two) but it's laughable to see people defending the asshole invader with the scraping spear. It takes a lot of time and effort to craft the +7 spear in the first place, not to mention the guy also had Yurt's armour equipped (Which to be fair is the most appropriate armour to wear considering what he was doing). I'm not sure what ring or spell he was using to regenerate health that fast but there's no way you could deny he was a low-level griefer.
Who knows, maybe the invader was just really into role playing and thought "HEY, wouldn't it be a great idea if I foreshadowed how much of a prick Yurt was? That'll really help Brad!".