Woes of Warcraft

Ask them why they're bothering.

Raids are pretty boring affairs, not unlike working on an assembly line. Most players put up with it for the purpose of achieving a shared goal, but most importantly, having a shot at the phat lewt. This is why raids really blow donky nuts, incidentally - out of 40 people, maybe a handful actually go home with anything. But of course, they'll tell you that this is the purpose of raiding.

Follow up with that most damning of questions: then what?

It's worth a shot, but appeals to logic probably won't work once you realize that it functions a lot like that one old anti-drug ad. You raid so that you can get better gear, so that you can get stronger and raid more efficiently. Fun never enters into the equation. The only purpose is keeping up with the Joneses.

If you actually care about these guys, my reaction would be to sabotage their internet. Just be careful about actually following that advice. Since you're dealing with an honest-to-God addiction, they might get really violent if they can pin it on you. I know my brother sure did during his addiction period.

Jam it back in, in the dark.