This is absolutely NOT a silly law. Not everyone owns a car, but I'll bet most everyone rides in a car & that child needs to be protected. In most states, the hospitals have a stash of car seats they will provide free of charge if the parents can't afford one. In my community, the fire department does this service. Your knee-jerk anti-car stuff is getting on my nerves. I live in the woods where every trip is going to be 50 miles. I don't go out much these days. I do appreciate your support of mass transit & city living for that matter. But don't let that get in the way of laws to protect babies for pete's sake.
UPDATE: The following comment was accepted by Atrios:
I agree with you.