Yeah, you don't see this sort of stuff in the avarage game of soccer, but you do see a lot of sneakyness in those games. A lot of pinching, punching, kicking and tripping. So there is a lot more hidden violence than in paintball. So everytime something physical does happen in paintball, it's instantly noticed. Like I said, paintball is normally game without any physical contact, so there is less chance to get at each other and/or get even. It happens all the time in American football, soccer, basketball, hockey and many other sports. Waterpolo is particularly violent, but you just don't see it.
There's not a lot of violence in paintball these days, the conditions just ain't there.
The olden days on the other hand, man.... But back then paintball attracted a whole different breed of people.