Okay - your bullcrap arguments are really getting thick.
Had your sister not had her seat belt on she might have drowned from being knocked out upon impact with water.
The seat belt most likely saved her life by giving her the ability or opportunity to free herself.
It's fine to be opposed to something for many many reasons.
To make up ridiculous horse feces that's completely unsupported by fact is just going too far.
It's like saying "My grandfather smoked 2 packs of cigarettes a day for 60 years, and lived to be 95 years old without ever getting cancer, so all this crap about the dangers of smoking is nothing more than big government interference in our lives. Smoking is obviously a safe habit."
Do you NOT swim in the ocean because a few people each year get killed by sharks?
To suggest that seat belts are dangerous to use is so ludicrous and stupid it's not even funny.