In Sweden it's forbidden to feed live animals to other animals(bugs are seemingly not included in the rules). I have no statistics of how many people own snakes, and it could be that people simply shut up about it, but it seems like most snake owners who talk about feeding online only talk about f/t feeding. It's a big nono to feed live without trying f/t, only out of desperation. It's forbidden to sell rodents knowing they will be given live to animals, but frozen, or for breeding feeding animals that will be humanely killed before given is ok to sell. I think you can get a permission from the government, but I would guess most people skip getting that.
So, it seems relatively easy to get snakes to eat pre-killed, at least that's the joint voice from breeders and the small snake community. But that doesn't apply to all snakes, people admit that.
People who have rodents as pets get pretty vocal when someone promotes feeding live.