I used to go well beyond the speed limit, but got scared shitless earlier this year when I almost got stopped by the police. They were measuring the speed of oncoming drivers in front of a 40 km/h area. I drove in there at around 75 km/h, but decreased my speed to around 55 km/h when I saw them, and then entered the area at the appropriate speed. I'm still paranoid about getting a bill, since they had that measuring system pointed at me when I was decreasing my speed or even before. I later found out that the bill could be as high as 1000EUR +, so I started driving appropriately since early January when the event happened.