Is it time to start calling out bad cyclists?

I had a pedestrian walking on the cycle lane today. It is green strip on the road with a cycle painted on it about every 20 meters, and isn't close to/looks like the kerb at all. The kerb was clear of any obstacles so I could see no reason for, basically, walking on the road.

Didn't get out of the way either despite me shouting "oi, you're on the road" escalating to "hey get out of the way!".

Is this a karmic balance reaction to all the kerb cyclists? Either way...very strange.

I had a fairly alarming moment on my commute home when I realised that the guy up in front of me that I was planning to overtake was not in fact a cyclist travelling in the same direction as me more slowly, but was a pedestrian walking in the road in the middle of the commutopeloton directly towards me. I've no idea how I didn't clock him until I was only a few feet away. Maybe hidden by another cyclist? Bloody hell, though. I went round him but he gave me a right evil look as though I were somehow to blame for his poor life choices.