Is it time to start calling out bad cyclists?

^ those delays to your journey are negligible compared to the stopped waiting time at junctions. Feel free to measure it & report back if different.

Depends.

I don't care if there is eventually space for the car (and me) to get past but during a lot of my commute the road is very narrow and the queue is travelling traffic light to traffic light. There are certain points with very short green lights, where if you get held up you miss the green and hit every subsequent red too.