right lanes for driving straight and turning

did I miss the part of driver's ed where if you want to go straight in the right lane that is labelled for cars to go straight AND turn you will be honked at, flipped off, and cussed out for sitting at a red light waiting to go straight instead of turning???? what is up with that? should I just stop using those lanes? why labelled to go straight if everyone wants to only use those lanes to turn right on red?