The practical thing, IMHO, is to flee the area if threatened, call 911 on the way out and report multiple people shooting at you and your children in the general area you are at. (if they are).

Or if you don’t feel threatened, i.e. just guntards having a good time and not threatening, start screaming.

It depends. But in my past experience, guntards being stupid and shooting in the general direction of people are typically not good gun owners, they’re out drinking, partying and or have a variety of other reasons they shouldn’t have firearms. i.e they’re on probation, ex-felons. Let them deal with the cops for blithely lobbing bullets around.