Just ignore those guys.../..there are a few of those guys at every range in the country unfortunately....but I tend to kind of smirk at them when they start running their mouth and turn my back on them ( or growl a little -- and since I'm 6'5" and 290 or so, it works pretty well ) ...
Shoot and carry whatever you want...( I carry a revolver once in a while, and I don't feel outgunned either ).