I'm tried of the excuse "It's the internet lolololo I can be as immature as I want deal with it". The internet is still in the real world, it's just a difference way of communicating. You should still obey the same set of rules to be respectful to everyone as you were if you where talking to them, writing them a letter, or talking to them on the phone. Of course, an online game is a much more causal environment, so a swear here of there is ok, but it still doesn't make you cool if curse just because you can.