The only situation in which I could see that being the case would be with a carbon MTB frame, a rider who is using it far beyond it's intent, and a poorly set up drivetrain.
In that situation, you might get enough force from chain slap to ding the frame, and if repeated often enough, those dings might turn into a crack.
I seriously doubt it, but it could happen, in theory.
In the case of an aluminum or steel frame, No way, no how, not gonna happen.
Edit: I hadn't thought of eventual corrosion, in the case of steel. I suppose that is also possible.
Still not going to "literally snap frames" from chain slap. Nor would electrical tape prevent it, if it was going to happen, in a different universe, with different physical laws, or something like that. Dubious is one word for it. The other comes from the hind end of male cattle.