There’s been experiments around changing speed limits. What they found is that people consistently speed by about a constant amount over the posted limit, so they keep the posted limit lower, and have all enforcement be at around 10mph over it.

Yay path dependence!

As someone who actually does read the rules for a bunch of places; they often have no relationship to what actually gets enforced.

This isn’t just a problem for social media communities. A bunch of business use boilerplate contracts and terms-of-service that again have no relation to how they actually operate.