Yeah, that's a lot of it. None of it may hurt the kid at all (you ever been on a school bus? 'nuff said), but it's hard to be a parent around stuff like that. At least for me. I go into kid protection mode and spend more than half of my time watching for incoming puke streams, fist fights, and beer bottles. I'd have to go club, otherwise I wouldn't be able to enjoy the game myself. Realize that it's like you're taking your kid into a 70,000+ seat sports bar.
That said, have fun with it! Cook some hot dogs in the parking lot. Toss a ball back and forth before you head in.
I get annoyed at some of the behaviour when I'm just with adults, but it doesn't *really* bother me. The "positive" parts of the atmosphere still outweigh the four puking dudes, three fighting jerks, two swearing drunks, and the partridge in the pair tree.