Hi,
I think the novelty of the drone thing will wear off some, but yeah, some consistent rules will eventually come around ... however, they will be wide and different ... for example, a drone flying over the cow pasture to count the number of crows and patties or cattle, is in a different zone than one flying over our neighborhood looking at someone's yard where the teenager is sunbathing, and the son is spraying the daughter with a bottle of water!
One is an invasion of privacy and the other, likely won't be considered at all.
In the end, not everyone will be able to afford the spendy and better drones out there that can see things ... anyway! But that brings things back to those who can and those who can't, and those who can in any country have always flaunted the law, regardless, and in some cases taken the law into their own hands!