So long as they’re containing themselves to their own house or yard, it’s a nuisance. If it ever breaks out of the yard and into the street or beyond, it’s a problem.
It’s in the street fairly often, but the numbers are usually 10 or fewer, and while there’s much evidence of alcohol and some of drugs, there haven’t been any weapons in sight (other than the 4th of July, when my own offspring were also involved with some exploits involving explosives).