Is it time to start calling out bad cyclists?

Tonight in Southwark, a bloke on a hybrid approached lights that had just turned green, with a truck clearly indicating left, I assumed the guy had seen this and would pull up sharp as he appeared to be heading straight on,instead he swerved around the let turning truck, narrowly missing contact.

I pulled up next to him at the next set of lights and said that was close, he replied, oh yes, you have to be careful with left turning lorries! Inn a friendly tone, I pointed out the obvious and he was genuinely surpised that he was at fault.

Almost beyond belief, were it not a daily occurrence!

This^^^^

Most of the people i point stuff out to either...

1 - throw a massive wobbler about being told how to go about their business
2 - do not even begin to realise the danger they were in/ put themselves in*

*generally I put this down to people in cities who pick up a bike and have never driven a car before, hence they just don't know. Personally I've had the gift of driving just about anything on wheels, cars, vans, panel vans, hgvs & heavy artics, dumpers, jcbs, manitous, motorbikes, sidecar bike, tarmac machine! so have had a fairly broad experience of what different vehicles are like to crash/ drive.