Replying to Biggest pet peeve?

What is some of your biggest pet peeves when going to a resort? For me its adults who sidejump the lips (children get a pass because dont know any better, even though they should) or when anyone (skier/snowboarder) hits the back of skis in line (or on the lift) and doesn't apologize. That last one is dumb because I end up using my skis on rails or riding out onto concrete but still, its the principle. If I even tap someone's ski or snowboard I say "my bad".

So what is something that grinds your gears?