@Sailor Steve
A person who doesn't wear his seatbelt will be thrown around inside the car in case of an accident. If the person sits on one of the rear seats they might fly through the whole car and kill the people on the other seats as well. That's why I say that everybody HAS to buckle up. If not for his safety then for the safety of the other passengers.
Then there is the problem with group pressure: "You want to wear a seat belt, ohhh you're such a wimpy baby...". This would keep a lot of the younger drivers from using seatbelts and this group is especially prone to get involved in accidents.
On a secondary note a young death costs the society a lot of money. People went to school for years, parents got tax cuts etc. A person must have worked for several years to pay back what society has spend on them before they could work and so I think the society has a right to tell them to prevent some unnecessary early deaths by using a seatbelt.
@Ducimus
Yeah, it's also beyond me why a lot of people don't use them. When we drive to a local restaurant for lunch where I work a lot of my colleagues don't use their seatbelts which is especially stupid as they have cars with airbags (have fun facing those when not wearing a seatbelt....).
When it's my turn to drive I've always have to remind them that the seatbelts are paid for and can be used free of charge....
