I've had some similar experiences, and it is always fun to just listen to the idiots ramble on. ..... and then setup a target next to them. I especially love it at indoor ranges where I can wait for them to motor their target back to look, and then motor mine back right after them. All it takes is a brief glance, and then love to watch them shutup and slink away. Some of the best fun there is.
The perfect way to deal with it! These fellas were impervious to their pathetic shooting results though...Ego's are too big. Still, we got a laugh so we should thank them. You should have seem the grip on that handgun by one of those guys...Had me in tears almost.