I use a Phantom 3A, for filiming/photography in remote scenic areas. I'm a member of FPV UK, purely for the public liability insurance cover: £5m for under £16 per annum.
I've no problem with the proposal for registration and training. However, as you point out, it's not the law abiding owners who are the problem, it's the cowboys. A friend's son bought one and flew it from his bedroom window, in a dense housing estate, in a bloody snowstorm! He lost contact with it and goodness knows where it ended up. He's done similar stunts since, flying in populated areas where it's totally inappropriate. It's thanks to this kind of behaviour that these regs are coming. He'll have lost interest before then and have moved on to another fad, probably to ruin that for others too. Nobber.