I'm changing one of mine and replacing it with another:
Originally, I said that, bogus rulings are really annoying, but, players that fold out of turn(see SirRarwsAlot's post for the breakdown on that) are WAY worse and FAR more frequent for my liking. They hold their cards face down in mid air towards the dealer when it's nowhere near their turn...you say something to them: "Uh, do you mind waiting your turn?" "What are you talking about, I'm waiting til it gets to me."
Jackasses.