I was turned off of playing action games online when the children discovered CoD just after the United Offensive expansion pack came out. Before that, it was fun, people would pay attention to teammates and tactics. And the latest generation discovered online gaming.
Now I only do ARMA and ARMA2 online, because it's far too complex and serious for the kids to like. And only when my friend who's in a realism-oriented group calls me and begs me to play because they need another player.