All of the above--esp Star Spangled Banner. Also, fiddlers who play a tune A/B, A/B as opposed to AA/BB, AA/BB when the band is playing AA/BB........also, people who say--"I only play in D"......and then proceed to do so regardless of what key the band is playing in.......I used to have to play with a (fiddler?) who did both of the above at the same time. Always in D and A/B.......he died.

Also, players who must BANG their foot on the floor as opposed to just tapping quietly.........BANG, BANG, BANG in cowboy boots............I've been tempted to take a hammer and a nail...........