Don't sign a game that you're going to replace out of because you "aren't interested".
Don't rage quit games. If there's someone in the game you hate and are going to rage quit because of them, don't sign for games they are in. For the game you're already in, grow a pair and finish.
If you're replacing out of multiple games because of anger, or disinterest in playing, take a break. Don't put the host in a situation to have to replace you just because you're being a little bitch about things.
Just don't do it.