Like many on here, I drive a car, ride a bike and also a motorbike. People really need to learn to co-exist and stop being so angry and righteous when out and about.
Having said that, on only one of those modes of transport can I use it on the public highway without any formal training, completely anonymously and therefore with complete impunity. And as has been proved on more than one occasion, you don’t need to be surrounded by “a ton of metal” to kill a pedestrian or other road user.
I therefore cannot see why cycles shouldn’t be subject to the same licensing and taxing as every other vehicle on our roads. It would certainly moderate behaviour if a cyclist considering jumping a red light thought he might get a PCN through his letterbox from a fixed camera.
And if the number plates were fixed at the rear of the bike saddle, it might encourage cyclist to wear long coats to cover them, also saving me from having to look at their sweaty Lycra clad arses when I’m stuck behind them.