Sure it may be a 'fun' thing to do, and a way to release anger, but the children do not know what the words mean. How would they know that 'f*ck' is sexual, and that most insults are. A lot of people will not like their 6 year old to reference sex when he/she doesn't even know what that is yet.
Hey! I swear! This is a debate! What I'm saying isn't necessarily my opinion. You are letting it get personal! Onto my argument:
Yes, 'bitch' you just stated my next point. Adults swear. ADULTS! The older, maturer, wiser people have this choice. They have a fully developed brain. They can make good choices. Children's brains are still developing, and they might swear in a place they will later regret. Such as in a school interview. I dont think the school would like that very much, do you?