Ugh, new neighbors....(mostly a whine).

File a complaint?

Call CPS and complain to the managment.

Complain to managment. They will continue to violate their lease and make your nice happy apartment complex miserable unless you compain now.

I have always rented and never minded putting in a complaint, by being ANON. Then act like I never did anything wrong. Although there was this one time I complained about 2 twin 7 yr old boys and the next day found a wet/dirty diaper ripped apart in front of my door ...figured it was the kids, only they would have known it was themselves being little trouble makers, why would the parents know it was me? and why would they care to rip a smelly diaper up on my doorstep? All the parents knew was somebody complained and there wasn't a name given to management.
Actually if you suspect illegal activity call the FBI they will keep you ANON.

I don't want their lives ripped apart. I just want them to CONTROL THEIR KIDS!

I have no problem reporting things. The guy down the street from me had 2 tacky mattresses at the end of his driveway for 3 frigging months. I finally jokingly asked him what was up with them and he said he kept forgetting to move them. I thought he would get the hint but didn't. Finally my Husband got fed up and called codes, turns out somebody else had called that day also complaining. I never mentioned it, he said he was pretty sure it was his next door neighbor who had called because they had gotten into a fight the day before that (talk about good timing!).

I would contact management. They are violating their lease. Wither or not you want to disrupt their family or not, they are causing more harm than good by having all those ppl in one apt.
My dh is a manager for a 100 unit apt. complex and has to deal with this all the time and believe me he doesn't not mind those types of phones... there are safety codes, housing codes etc... that apply to situations like these.
So call and file a complaint.
Good Luck...

You don't want to disrupt the family's lives but it is okay for them to disrupt yours? And to add salt to the wound, they're doing it illegally and you are still okay with that? Those people obviously don't give a crap about whose lives they are disrupting, what laws they are breaking or what trouble they could cause for others, but you are still concerned with their well-being? While I think you are a very nice person, I also think you need to rethink your priorities.

The children are wild & are disturbing your peace....They are breaking codes that your building mgmnt will have to pay the fines for if they're caught, which means your rent may go up to cover those costs....And once they realize the other tenants are willing to look the other way, you can be sure they'll be letting other families know so they can move there, too.....

Yup, not disrupting their lives is a grand idea. So when are you moving?

Report them to management!

Complain complain complain, bitch about it to the manager if you have to, don't let them get away with it or they'll keep doing it and the peace will go to hell. Seriously, complain about it, I had neighbors like that once and tried to be nice, ended up calling the cops on them once a week after the kids tried to break into my house.