Is it time to start calling out bad cyclists?

We can be fairly certain they did the usual thing that all non-cyclist-sympathetic people do, which is let a car go and then completely filter the cyclist from their vision, or belligerently walk in front of the cyclist expecting them to stop or crash to avoid them.

With knowledge of this cultural status quo, it would seem most prudent to slow down in anticipation.

Granted. And I like to wave people out - especially if I haven't got a head of steam up yet, I feel like it's good PR for cyclists.

On the other hand, I do hate those situations where you're left sat in the middle of the road just inside a side street. I'm always worried that somebody in too much of a hurry crossing from the far side of the traffic won't spot me. It's one of the times where you've got no avoidance choices.