I started to get occasional gray nostril hairs. It's annoying because they are super noticable but also in there far enough like a normal hair that I can't just yank it!
I don't think that was really the point but I too thought of the example and wondered how many more speeding cars this would create. If people obeyed limits and had good optimization that would be good though. It would reduce gas consumption and save people time. Cars unfortunately are here to stay. It'd be nice if more people rode a bike to work from time to time though.
The mildly infuriating thing is we still go there on occasion