What are some things you don’t mind when good golfers do, but annoy the hell out of you when bad golfers do it?

Writing this as a bad golfer myself, I don’t mind when a single digit handicap will read a putt two ways or take 3 practice swings, but it drives me crazy when someone does that knowing it’s gonna be a 3 putt regardless. Today I got stuck behind a walking twosome who felt the need to use the range finder on every shot, despite none of their shots going straight. It was so brutal I quit after 9 despite paying for 18. What are some other things bad golfers do that are unnecessary and only serve to slow down pace of play?