In more ways than one. I've always found it intensely irrtating, even though some will say that's exactly what it's supposed to be. However, it has now started going off at random while I'm driving, sometimes continuing non-stop for about five miles before stopping – then sometimes starting up again.
There must be a pressure sensor under the seat (at least under the passenger seats – perhaps it assumes that if the car has started the driver must be present) and there are two thick wires under the seat, plus a thinner one attached to a connector block. Are these relevant to the seat belt alarm, and if so, which one is it and are there any dire consequences of disconnecting it? Alternatively, is there a hidden menu option somewhere to disable it?