I don't play FPS's online, so I can't comment on that. However, I've played WoW, and here are my observations:
I used to be in a guild that had no age restriction. There was some talk about it, but other than that, everyone with the right application was welcome. This led to our guild being full of a lot of kids under 16. It worked out for a while, but in the end there were a lot of irritations, mainly because of a different view on the game and how it should be played. There is just a big difference if you want to play a game after a day of work or after a day of school.
I don't have anything against children playing games, but in a game like WoW I just don't like to team up with them for the same reason I don't go out drinking and partying with children --> different view on things.
I used to be in a guild that had no age restriction. There was some talk about it, but other than that, everyone with the right application was welcome. This led to our guild being full of a lot of kids under 16. It worked out for a while, but in the end there were a lot of irritations, mainly because of a different view on the game and how it should be played. There is just a big difference if you want to play a game after a day of work or after a day of school.
I don't have anything against children playing games, but in a game like WoW I just don't like to team up with them for the same reason I don't go out drinking and partying with children --> different view on things.