It was not these private individuals but rather law enforcement groups--sometimes using automatic weapons--that concerned neighbors.
A shooting range built for youth to be able to shoot skeet is getting bad press because cops are firing automatic weapons. That's about the gist of the article. I would be willing to bet that the machine gun fire is rare, but the neighbors' real complaint lies with all the .223 Remington madness that gets fired from AR type semi-auto rifles. Fair enough.
How about a push for taking suppressors out of the NFA? That would settle the problem pretty quickly, don't you think? It would also prevent hearing loss.