Phony "gun show commandos" who tell you all about their military career, ad nauseam, in a theater of operation their age precludes them from ever having participated in.
Guys who might have been in the military, but are all past members of whatever elite unit their branch of service had. There must have been millions of SF and Seals, because I'm sure I've met half of them.
People who load their weapons up with so much "tactical" equipment, it could never be used, or carried for that matter.
Guys so out of shape, but who insist they're still covert operators as they regale you with war stories while wearing their camouflage Crocks.
Hearing the word "tactical" applied to anything, ever again.