WoW: How much is too much?

Shocker, I was playing World of Warcraft last night. Tuesdays are the usual day for Karazhan runs in my guild. I went for a slurpee run and came back to full raid, ready to go. Then the main tank (let's call him Asshat) leaves, saying the group was insufficient to complete the instance.

Some background on Asshat, he has nine level 70 characters and a few level 60+. Getting a character to level 70 takes (guessing, haven't leveled 1-70 since they sped up the process) nine to eleven "play days", which means 9x24 to 11x24 hours of playing that character. This guy is the very image of a WoW addict.

Well when he left the raid group, that started drama in guild chat. Asshat said the healers don't have good enough gear for the place, so we won't get far, yet his gear sucks more. Asshat went full out Drama Princess and gquit... then logged on another alt and gquit... then logged on another one and an officer just kicked him and another 5 alts he has in the guild. No one was sad to see him leave, he has a history of complaining about the guild being below his level and I've only ever heard the officers say negative things about him.

A few hours later, the guild leader's wife started reinviting Asshat's many many alts. I don't agree with her decision to allow him back in but I don't know what other discussions happened to lead to it. No one welcomed him back. I got a few whispers of annoyance, "Argh, they let Asshat back in? Why?"

The character Asshat was going to take to KZ last night is a paladin tank, which we really need more of for Mount Hyjal. But is it worth it to have THIS guy? He's got a character to fill any sort of group need... tanks, CC, healers... but the character's gear is all only "moderate" and his play skill is spread so thin, he's not really good at any of the classes.