This happened to my neighbors a few years ago. Parents went out to dinner and told 15 year old daughter she could have some friends over “un-chaperoned”. Word went out on social media and it was massive number of kids showed up. Another neighbor called the parents, the response was, “oh, it is ok, we told her she could have a party, mind your own business”.

Girl called the cops on her own party, some other neighbors may have called cops also, but no one ever admitted it. We stood in our driveway and watched cops herd huge numbers of kids outta that house….cars were parked up and down the street and kids were piling in, pretty sure there was drinking and drunk driving going on. Cops were not stopping kids AT ALL, just getting them the hell outta our neighborhood. I think there were several hundred kids, craziest thing I have ever seen.

Last year different neighbor girl had her 16th bday party. They are Mormon and “not supposed to drink” another neighbor stood out front with her English Mastiff and if she saw kids coming in with alcohol or looking suspicious she wouldn’t let them in, it was magnificent! She actually was able to stop the brother of the girl that had the outta control party trying to bust into the party with arm loads of alcohol.