Updated. Also, rob, I am going to say no to just dropping/resetting, as it could possibly be abused in early games.
Also, not sure about requiring games (notably beefsupreme). I feel that this is not a huge issue, but if a lot of people do it, this will become stagnant, which we all know sucks for an event. I'm thinking mod-killed after 2/3 rounds of inactivity, and they can rejoin if they want. Not sure about parasites for this one either.