Agree with this. It's a much better argument that your bag of groceries or backpack on the seat is setting of the occupancy sensor. Except that happens in my 2008 Mitsubishi - a far from modern car.

I have heard maybe some modern cars have better occupancy sensors based on something better than weight but I'd expect a dog to set of most sensors designed to detect a human :)

I also wonder if the radio is disabled primarily because a lot of modern cars seem to use the radio speakers as the chime - not sure if the F150 does this - but also even if the chime was separate I guess if the radio was too loud you wouldn't be able to hear it.