Is it time to start calling out bad cyclists?

Some bellend t'other day was attempting to draft me in rush hour traffic on Great Eastern st to the point where he was clipping my rear tire regularly. There were plenty of opportunities to overtake, nevertheless he decided to sit on my back wheel all the way to Clerkenwell. Was so tempted to take him out with a little speed check, I'm sure his face would have done a better job of stopping him than his SS rear brake only arrangement!

I find this situation an ideal opportunity to clear my throat/fire a snot rocket/pass wind. If that all fails I take a drink and squirt a load of the drink over my shoulder.

Seems quite effective.