Crap.
Maldonardo is dangerous.Scumacher was the most dangerous driver to ever sit in an F1 car.
Hamilton isnt dangerous.Never has been.
Feel free to post specific examples Ralf. 
That Lotus French muppet is also quite dangerous, think it was 7 races last year where he caused incidents on the first lap?

One very serious, nearly taking off Alonso's head

As Albs says Ralf, lets have a specific example, one race, one over-take/corner where Lewis was dangerous? All I've ever seen from him was some brilliant over-taking moves when needed.
As for the last race, Webber dialled down his engine and was looking after tyres, as per team instructions. If he had known Vettles intent, I suspect he would have put the hammer down much earlier. Used to like Vettle, thought he came across as a like-able chap, but he is becoming more and more like Scumacker ever race