Cheap, crappy little rice-tastic cars with enormous yet poorly installed subs that sound like the world's most annoying fire alarm bell at every bass note.
Crotchety old range Nazis. Note; strict adherence to safety measures sternly enforced is great. That doesn't mean publicly castigating a new shooter for minor infractions (Informing someone=good. Being a dick and humiliating a new person=bad), rigorous adherence to petty non-safety related rules (one round per mag at a time on the rifle line, no vaguely human
shaped target etc). Acting as tho the very idea of their range running informal IPSC, IDPA, or 3 gun matches is tantamount to suggesting they have a fund-raising orgy / human sacrifice. If you respond to "Do you guys ever have IPSC or 3 gun matches here" by saying "No, no, no. I think a range out to North Bend did, but then someone shot himself on accident."
Civility and respect don't reduce safety. Being an ahole does reduce the chance new people will want to be shooters.
People who do not, in fact, ride that Harley with straight pipes. They just sit in their driveway and rev the effing thing for like an hour.
Gun shops that treat anyone under 65 as unwelcome intrusions.
Beautiful old mil-surps getting bubba'ed. I don't mind sporterization per se, but if your primary tools are a hacksaw and a large hammer, put the freaking K-31
down.
"Gun shows" consisting mostly of beanie babies, beef jerky, Nazi memorabilia, and crap-tastic Mosins priced about 5x what you can get it for at a store.