I have done it, but not on purpose but it kind of in a way looked that it could of been. To make sure the pedestrian realised I didnt, I got out of my car and apologised and offered to drive him back to his home to get dried off.
As an PP has said, it is illegal. If he wanted too- he could of taken note of my licence plate number and telephoned the police, I would do after all if I thought it was done purposefully to me.
I don't see how it is amusing personally. I know people who have been carrying laptops and expensive phones when it has been done to them and it has destroyed them.