It happens ALL the time, it's terrible. Red lights mean nothing to them, i'm waiting for the day one of them runs into me. It nearly happened to a guy in front of me the other day, it was a green man and the cyclist had to do an emergency stop.
Also on my walk to work there are a lot of one way roads and cyclist are quite often riding on the path at fair speeds. On the quieter roads they just go up the road the wrong way. Lazy fools.
Do they wonder why they have such a bad reputation and a lot of motorists hate their guts? I don't, I always give them space and i would never condone some of the rage that we see on youtube and the news, but they really don't help themselves.
It's simple, they are road users and they should obey the rules.