Is it time to start calling out bad cyclists?

-watches white fixed rider skid to a stop as they go up inside a turning lorry on Upper Regent's Street-
me (to white fixed skidder, after my hear starts beating again): "Probably not the best idea to cycle inside lorries, especially at a junction" (or words to that effect)
fixed skidder: points to white beats earphones, shrugs and cycles off on the pavement

I can understand saying something if the white fixed rider has endangered yourself by their actions.

The forum seems to be creating a vigilante type attitude towards other cyclists. We know best and we will ram it down your throat at every given opportunity.

Divided we fall.