In my personal opinion, bicycles do not belong on roads constructed for vehicle traffic, period, not ever, not even the polite riders. If there isn't an actual bike lane or a park constructed just for bicycle use, then the bicycle shouldn't be there, I don't care what the law is. You won't change my mind about that.
I agree with you Carol. If they're going to be allowed on the streets, then they should be ticketed for turns without signals and for running lights and stop signs like cars. They are a real hazard on the roadways, especially if they're monkeying around like I've seen many of them do.