I wouldn't agree that 99.9% will take F/T. I have a number of BP's that would rather starve then take any prey that is not live. Having said that, I think feed non-live prey is a learned feeding response and a good percentage of them can learn it. Some however will not. Only your snake will be able to tell you by it's responses what it will and won't accept.

Live feeding is as responsible a feeding decision as is frozen/thawed or pre-killed. As with anything to do with your snake though it's up to you to educate yourself. There is tons of information available on the proper and safe methods of live feeding which are important to understand before you put your snake into any situation where it is in an enclosed space with a live prey item.