^ I second that, Always.
I ride and show with a gaited barn- but I don't ride gaited myself. At the showgrounds we once went to, everyone glared at the gaited horses and their riders. If they realized I rode with them, they glared at me too. It is an open show, local, with $.50 ribbons as prizes. The attitude is really not necessary. :P
Also, I get slightly annoyed when people try to make their horse sound more difficult than it really is- I see this at some shows too, where people will be like, "Don't trot next to me, my horse is sensitive!!!!" and their horse is super calm. It drives me bonkers. Rudeness in classes/warm-up rings period upsets me. It's just a local show, don't get your panties in a bunch, as everyone likes to say.
Judges who take themselves too seriously bug me too.
As far as riding goes, when people have puppy paws, it drives me up the wall.