[Aron in Toronto]

One major factor you've left out is that children lack the bone and muscle strength that adults have and "could" be at a greater risk of serious injury caused airbags.

I used an airbag deactivation bar when my children were smaller and my youngest is still what I consider boarder line size at ~70lbs, so I've been through the same debate with myself that you are having, and I agree it's a bit of a hassle. I'm surprised that modern Porsches don't have an automatic airbag deactivation for passengers under a specific weight like most new cars.