I remember resisting the original lap belts and the early shoulder/seatbelts. However, they are quite practical now and my car chirps at me if I go over 15 MPH without my belt on. There seems to be sufficient evidence that seat belts are far more likely to help you than hurt you, so I do support these laws. It doesn't cost you anything and the cars all have them already installed so there isn't much case against them.
At first they felt weird. Now, without them, I feel uncomfortable.
So, yes, I support seat belt laws.
I used the example of my accident in 2005. It was a major interstate multiple cars flipping and spinning kind of accident. After looking at my chest , neck, abdomen (path of belt) the doctor made comments on how bad it would have been without the belt (catastrophic injury or death). Even if my injuries were totally covered by insurance (either medical policy or through the car insurance)-I am the single mother of a special needs child and the primary caregiver to my elderly mother with multiple medical issues - can you imagine the financial impact if I was catastrophically debilitated or if my mother was forced into long term care? My wearing a seatbelt, not only saved my health insurance company a chunk of change, the government was spared taking on my former responsibilities of mother and caretaker of my elderly mother.
I feel the same way about helmet laws. I don't want precious to get their head crushed, but I really don't want the government caring for a catastrophically brain injured person for 60 years either.