Comment by swiftcoder

> Do seat belts solve any coordination problem? Do they benefit anyone but those wearing them? No. Therefore, the state has no business mandating them no matter the harm prevented.

If drivers were the only ones who wore seatbelts, you would have a point. In practice, seatbelts save the lives of the passengers, spouses, kids, etc. who are riding in the car, and hence this is indeed a coordination problem.