Is it time to start calling out bad cyclists?

Tonight I saw this tit whose indication method was to punch the the air to his right then immediately veer right without looking. Just staring dead straight ahead the whole time, at speed. Was so close to taking people out again and again.

Mayb he was on drug? Or maybe he is just born a cunt. He might as well not indicate.

Just out of interest, when you and everyone else indicate, do you sort of wave / move your hand (not the whole arm of course)? I see some people do that and it got me thinking is it because moving things are more noticeable? I do that myself sometimes...