This is what park owners and managers face on a daily basis. What and when does behavior cross over into unacceptable behavior. We have quiet hours, but they are not silence hours. What is acceptable to one person is very unacceptable to another.
Alcohol is a good example. Many people accept drinking alcoholic beverages as totally acceptable in a campground. Many others are repelled by the sight of a beer can in someone's hand. We have to walk the razor's edge between the two. Drunken parties are not tolerated, but we aren't going to insist that alcohol only be consumed inside one's RV.
Sometimes, a holiday does dictate that rules and policies need to be changed. For example, on the 4th of July fireworks often go on until 11PM or later (darkness comes late in the north). It would make no sense to enforce a quiet hour before the fireworks end. Yet, we have had guests complain that the fireworks didn't end at quiet hour and demand we do something about it. Sometimes everyone needs to be flexible.
Without being there and seeing what was going on, the offending party may or may not have been within their rights. Loud music after quiet hours isn't acceptable, but again, silence isn't required either. The offenders sure had the right to be drinking alcohol, it would be their behavior that would dictate whether or not they needed to be reprimanded or expelled. And these forums are full of threads regarding whether children running around other people's sites is right or wrong. We consider it wrong, but it sure isn't an offense that leads to automatic expulsion.
Others have the correct answer, on holiday weekends especially, you need to chose your destinations carefully. If isn't that difficult to anticipate what you may encounter. And if you are inflexible in what you expect, it might be a good time to stay home or boondock where there are no other people to interfere with your plans.