I don't have any input as to if it affects other systems of the car (ie, airbags..) but I agree that thing is damn annoying, and pointless. If you can't remember to put on your seatbelt when driving maybe you shouldn't be driving in the first place, what else are you fogetting to do?? I aslo always wear my seatbelt when in motion, its just plain stupid to not where it. But when i'm sitting in the driveway with the car in park I don't need the damn thing beeping at me, or when i'm driving back to my garage, or when i'm driving between two houses that are less than 100 ft between each other deliverying food.
Is there any other way to do this that doesn't involve cutting wires??