I absolutely think they should. Seatbelts are legally required to be worn in almost every western country. It isn’t, and shouldn’t be up to you if you wear it or not. And whilst a lot of people do it, something heavy enough to trigger the seatbelt sensors should absolutely NOT be unsecured in your passenger seat, because it absolutely IS going to turn into a lethal projectile if you crash. Heavy items need to go in the boot, tucked in the foot space, or be belted in.

A crash without seatbelt is going to lead to far worse injuries, which will put a bigger strain on emergency services, hospital infrastructure, you’re more likely to require organ or blood donations for injuries that could have been trivially avoidable, blood an organ which are already in short supply, and then can’t be used on someone who actually COULDN’T have avoided their injuries, and the accident can be far, far, far more traumatising and mentally devastating for others involved if you go flying 10 m through your windscreen and your mangled body wraps around a tree.

If you’re willing to accept all that just because you don’t like a bleeding seatbelt, frankly you deserve more than to be dinged at.