I AM for seatbelt laws, if there is more than one person in the car. Your indifference DOES affect others, when you turn into a battering ram.
Speaking of, when I was a kid, we had this huge 1971 four door LTD, and on long trips my selfish older sister wanted to stretch out on the back seat, so I had to climb up and lay in the rear window "bay" (back then, that was a pretty roomy spot actually. Well, we were on a trip out West one summer, and I fell asleep up there. I woke up, and half my body looked like a lobster. Turns out, that that big curved rear window acted like a ****ing fresnel lens, driving through the West Texas desert. LOL
I was ****ed. LOL