[Morrigoon]

And yet, I see no problem with legalizing prostitution (though, just to continue my trend of incompatible philosophies, it's partly because by legalizing it, they can set restrictions on how it's done, including mandatory screenings, health coverage provided by the cathouse in question, etc.)

I hardly think that the lasting effects of wearing a seatbelt are even remotely close to the possible lasting effects of having someone inject chemicals into your body. Also, someone not wearing a seatbelt can go flying around a vehicle, injuring other passengers who were smart enough to belt themselves, or hurtling out of a car where they could hit god-knows-who/what. Likewise with certain drugs - if you're doing something which can force its way into my body against my will (such as anything airborne like cigarette smoke or pot), then I'm going to have an issue with that, whereas I have no problem with alcohol being legal, in spite of its history of being abused.