Is it time to start calling out bad cyclists?

There are a number of problems I think, or at least in my own experience.

• You see someone do something dangerously irresponsible
  
• If you catch them, then you'll (generally) have exerted yourself, you'll appear quite threatening just because you've appeared "out of nowhere", breathing hard, and you may be cross
  
• All the ingredients for a row are right there- the bad cyclist is going to be defensive, and if they do have at the back of their mind that they've been a bit naughty then they'll likely get angry as a first response
  
  

It's all a recipe for a shouting match as you cycle down the road.

A while ago I told a van driver to pull over so we could discuss what he'd just done, which he did.

I stayed calm, laid out why what he had just done was very dangerous, and why he should not do it, he responded that he'd do it again, and "if I killed her* then I'd just have to do the time then wouldn't I".

In all honesty, I should have just thumped him when he got out of the cab- it would have had more effect than talking to him rationally.

*He almost hit my girlfriend with his van