Anecdote: a street near my house in high school had speed bumps next to the park. Occasionally people would be woken up at 3am to a dunk Douchebag shredding down the road at 50 and launching himself off the speed bumps and smashing into stretside cars.
Eventually they had the bright idea (after a few years in a row of snowplows damaging their blades and the road needing repairs) to make a gentle S-curve instead. Now you don't feel like you can go 10mph over the limit, the road only needs minor repairs every 5 yearsnor so, and to my knowledge nobody has launched themselves into stationary vehicles in many years.
And even when they ARE "punished", their profits far exceed the fine, which IS their only punishment.
If the punishment for a crime is just a fine, it's only a crime for the poor.