Driving fast isn't a badge of honour. You're not in a competition.
I see it quite often going around Europe, lots of terrible or reckless drivers, and also a bigger majority going far too fast. I see plenty of it here too but not the same numbers. Basically you have an accident at any of these kind of speeds you're dead, passengers are dead. Speed limits are set with testing in mind, you have a decent chance at those speeds. Of course, most people drive at least a bit over, you're a slow driver if you drive the limit almost anywhere.
Maybe people need some photos of decapitated children or of brains splattered across windscreens before they see what happens when you lose control of a car at unreasonable speed.