Has to be my biggest pet hate. Why do people do it? Not only is it dangerous but it's flippin' rude. I had some idiot behind me this morning trying to park his car in my boot going through a 30 mph zone down a winding road that cuts through the park, it's all wooded and there's a kids' play area at the end of it, so a nasty stretch of road which could pose hidden dangers. Why is it people are in such a hurry, they must be a bag of nerves as well as thick. I just slow down even more to show them I won't be intimidated.