Well, since you asked....
I like to interject a second law as food for thought....
Mandatory helmet use on motorcycles.
My state does not have one....we motorcyclists succesfully overthrew the law about 20 years ago.
Bottom line: laws are made to protect people from other people, not protect people from themselves.
BTW I am religious with helmet use.....but I'm not going to shove my opinion down anyones throat....
Ok, with that in mind.....mandatory seat belt use.
I believe in it......heres why.
Often, immediatly after a collision, the involved vehicles are still rolling.
If the driver has been displaced and is no longer at the controls, that rolling vehicle may come to hit....me.
A mandatory belt law, being obeyed, will possibly keep that driver in some degree of control, or at least at the controls......in so doing, the law is protecting me from someone else.
We can talk about expenses affecting everyone and yadi yadi yadi....but as long as the law is created specifically to protect me from someone else....well....draw your own conclusions.
I also am a religious belt wearer, but this is more a result of many years of racing.....lots easier to drive from the drivers position so I kinda like to stay there.