There used to be one in Brighton, here in Adelaide. Nicknamed the Brighton Butcher, he covered both roads on either side of the railway station.
No warning, no helmet tap... just a shooting pain as something hits your shoulder and took a chunk out of your ear. He made people commutes about 1km longer all spring. There used to be some great bloody ear pictures on the Adelaide cyclists FB page. Got me twice over his time as the most feared maggie in the city, but never drew blood... left me with a red ear and a decent throbbing both times though.
Dont know if he disappeared by natural selection or if there was a helping hand from the council, but he stopped his reign of terror in about 2017.
They dont bother me, I actually like having a bit of a game or try and grab a selfie... but the Butcher scared the shit of of me, he was ruthless... when you realised you had accidentally ridden into his kill zone, HR went up to 150bpm and you muttered f%#k f%#k f%#k f%#k f%#k f%#k to yourself while scrambling for the nearest side road to escape.