What's with this whole 'you shouldn't ask people to be considerate because other people are not going to be considerate' attitude here? You shouldn't try to make a bad situation just a little better because you're not going to fix it entirely? What kind of attitude is that?
It's not 'realistic', it's lazy. Asking people to be considerate is totally reasonable, even if they aren't going to listen.
And yes, you should be logging out when you can't play. Everyone should be. If nobody else is that doesn't mean you suddenly shouldn't - it just means that everyone else is being selfish and you can either be equally selfish or do something small to counter that.
It's not 'realistic', it's lazy. Asking people to be considerate is totally reasonable, even if they aren't going to listen.
And yes, you should be logging out when you can't play. Everyone should be. If nobody else is that doesn't mean you suddenly shouldn't - it just means that everyone else is being selfish and you can either be equally selfish or do something small to counter that.