Ok, I'll try to keep it simple. The RF is not energetic enough to alter the water molecules themselves. If you put enough power (different from energy) into it, you may get the molecules bouncing around enough that some will bounce hard enough to be ejected (evaporation) but this in no way changes them chemically nor alters their physical properties. They're still water, and when they cool back down, they'll go back just the way they started, so whatever you're doing is not being done to the water itself.
Now, since you bring up impurities, it may be possible to crack the particles, make them smaller, knock off the corners, that kind of thing. This is how lithotripsy works on kidney stones, though they use ultrasonics rather than RF, but same principle. You may be altering the physical properties of the impurity particles, though doubtful the chemical ones. Malleable is definitely not the word you're looking for.
I suppose some guy may have tried it, and it seemed to do something inscrutable, so he built up a myth to sell some snake squeezins. Some people are just like that. Doesn't mean it doesn't do something, just that nobody seems to have a grip on what exactly.
Now, since you bring up impurities, it may be possible to crack the particles, make them smaller, knock off the corners, that kind of thing. This is how lithotripsy works on kidney stones, though they use ultrasonics rather than RF, but same principle. You may be altering the physical properties of the impurity particles, though doubtful the chemical ones. Malleable is definitely not the word you're looking for.
I suppose some guy may have tried it, and it seemed to do something inscrutable, so he built up a myth to sell some snake squeezins. Some people are just like that. Doesn't mean it doesn't do something, just that nobody seems to have a grip on what exactly.