I think the risk analysis of requiring parents to purchase seats for "under age 2" infants was based on the increased risk of putting those travelers "on the road", so not unheard of argument. But not an argument that's been used in negotiations, yet.
As a society, in whole, it is an interesting one.
Pipeline patrol, some traffic watch, even banner towing seems like a natural for UAVs--not much risk to commercial operators, either
GF