We are both safe, steady and 'positive' drivers, keeping up to the speed limit but not doing anything suddenly. Never had any accident or fine in forty years. (Insurer's dream!) But we are often tailgated/overtaken on dangerous bends, and it's usually by an Audi, BMW or Mercedes, usually black in colour. On can only draw conclusions from what one observes.
Not only do they overtake, but some of them then sit in front going more and more slowly in order to annoy us. We generally pull over and park until they buzz off.
We conclude that these makes of cars are expensive and showy, and capable of fast speeds (illegal, as our roads here are single-carriageway, so 60mph is the limit) so their owners want to cut a dash.
However, cutting a dash behind the wheel is dicing with death.