Is it time to start calling out bad cyclists?

Not a single anecdote, more collective. The advent of helmet-borne cameras has led to a increase in skull-embedded cameras.

I'd be interested in hearing where you heard that from.

Helmet camera mounts are designed so that the camera pops off in an impact.

Know of plenty of people who use them (myself included on occasion), some of whom have been in nasty collisions, and I've never heard of any of them who's injuries were exaserbated by the presence of a camera on their nut.