I went to my first game at 12, and it makes me sad to think that today some parents might not take their kids because other people don't know how to behave. It makes me even sadder that there are people who don't think pro sports need to be kid friendly. Believe me, if I didn't go to those games at 12, I wouldn't be nearly as invested in this team as I am today.
Edit: I'm not saying you have to behave as if you were in church. I don't mind crude language as long as it's not directed at anyone in particular. But there's no excuse for drinking to the point of sickness, fighting, etc....