This begs the question, and forgive me for sounding rude, but what kind of idiot doesn't wear a seat belt? Honestly, I just don't understand why you would risk your life like that. Have you seen what happens to people who don't wear seatbelts when they get in accidents?
Now if you wanted to disable it because you don't want it sounding at other times, I understand.
Sorry for the rant, but I have known people that have been killed because they didn't wear their seatbelts, as I'm sure many people do, so it hits a nerve with me when people are careless and don't wear them.
Kris