in a punk band but the guitarist was a metalhead, and he would play pinch harmonics all the time during practices, but none of the songs used them ever, so got fed up after like the 1000th time reminding him(not an exageration) so during a show when he played one i was already annoyed with him so this sent me into a rage and i whipped it out and told him that if he's wants to play pinch harmonics he has to play them on my c__k or on his own time or else he is out of the band. luckily this was a very short notice show at a small venue so only like 5 people actually showed up and they were friends so they had already seen my unit before anyways. oh and he left the band after this too
That would certainly motivate me to leave your band! lol
The most unprofessional thing I ever did was to start a song in the wrong key. It was a bass lead-in so it wasn't easy to cover up. Not too bad, I guess.