I stepped in one time when a local 'team' were being abusive towards some of the younger players. Unfortunately, the sport can attract the wannabe sgt majors who think their disgusting attitude makes them appear the big man.
That said, I have also told young players to stop being tools on the field. Like the one kid stood at the back of a room, shooting down a corridor and nearly hitting our team on multiple occasions. Or the kid who while we were sneaking up on the enemy started to flash his torch, and when asked to stop said "Can't make me" and held it constantly on.
However, I've also been pushed out of the way by a bloke who must have been in his late twenties as I was in his way. I just shook it off and got on with the game, no point in rising to it as they likely won't receive my 'feedback' in the way I'd like.