Is it time to start calling out bad cyclists?

I'd resist doing this, unless you want to become a poster boy for Daily Mail online commenters.

Emphasising the correct approach rather than demonstrating the incorrect is probably the better way to improve cyclists road use.

Good point. If I got round to this, I think it would be about highlighting risky situations like left turning vehicles rather than showing blatantly retarded cycling like riding fast on the pavement or weaving through people crossing on the green man. I don't want to give cycling critics any evidence of antisocial behaviour The people getting themselves on the inside of a left turner aren't being obviously retarded - in their own minds. They just havent figured out the risks, so I think this has positive potential if done right. Obviously emphasising the correct way is more important, but seeing the incorrect may also make people realise when they are doing it.