For those that aren't familiar with the Leotheras the Blind fight, he basically switches between demon form and human form every minute. About 15 seconds in to the demon phase, he'll summon people's inner demons on a few random people. Those people have to kill their own inner demons (nobody else can do damage to them) within 30 seconds, or the demon will MC them, and then the rest of the raid has to kill them. So, every 2 minutes, you have to deal with the possibility of some people getting MC'ed/killed.
It gets kind of tricky for some classes as well. Hunters and Warlocks cannont use their pets. If the pet lands the killing blow on the inner demon, then the person will get MC'ed anyway. Then there's the obviousness of not all people in a raid are used to having to do DPS.
At any rate, we've had a few people get MC'ed while fighting Leo. We've told people what to do to practice and get ready for the scenario that you get Inner Demons. So, on our forums, we started posting ideas of things for non-dps classes/specs to do to kill your Inner Demon. My "suggestion" was that any mage that did not kill their inner demon would be kicked out of the guild.
It was a rather flippant suggestion, but it got me thinking about how bad of a thing that would be. I mean, we generally value our raiders, and kicking somebody out would most likely be just a joke. There's only 1 person that I can think of that we actually kicked out of the guild.
We used to have a derogatory rank where the person could not talk in Guild Chat. Then it almost became too much of a joke (people were asking for it), so we got rid of it. It was always a joke, but when people starting asking for it, it got a bit too distracting from our purpose.
At any rate, I was trying to think of what a "horrible" punishment would be. Or what have other people done? You could always hit them in the pocketbook by making them pay x amount of gold, or else they wouldn't get invited to another raid until doing so. If you have the guildies on the sidelines, you can always sub the person out. But that seems to be more along the lines of a bad raider... which a lot of these people are not. If they live close, you can make them bake you cookies. (Okay, see? I've run out of ideas already.)
So, any effective punishments that you've seen in Wow? And no, I'm not talking about /gkicking. I'm trying to think of creative punishments. Hmm... maybe something like making the guildie kill a certain type of elementals until they've farmed a certain amount of primals. If it was a fire mage, for example (and none of our mages have gotten MC'ed yet), you'd make them farm primal fire.