Awww...
But just to summarize:
Safety belts are awesome and if you weren't wearing one when you crashed you would probably have died.
Safety belts suck and are a BigCorp marketing gimmick, and if you do crash, a safety belt probably won't help.
I mean, all that can be said is safety belts MAY help in the event of a crash. Or they may exacerbate it (getting stuck and trapping you in the car).
Does that mean we should all not wear it?