I haven't heard of people who have had a bad experience at University Commons, but no law students live there, at least as far as I know. I think I know why this is. IU undergrads have a strong self-selection trait. If a complex or dorm gets a party reputation, then those that want to party will flock to it and those that won't will avoid it like the plauge.
And I should point out that the Commons isn't nearly as bad as some places because it's not within drunk walking distance of the campus. I know it seems like I've been really against University Commons for law students, but I want to make sure that I say if you like it there, go for it.