Coming from one of the few people around here who understands what a double-blind test is and why we need them, your statement left me both shocked, stunned, and dismayed. (And May isn't very happy, either.)
So where is the double blind study proving zappers don't work?
Double blind studies aren't ethical. If 2 people are suffering from a disease according to a double blind study one of them gets the treatment and the other gets a fake treatment that doesn't do anything. Who would want to be the guinea pigs if they had a serious condition? How would you fake being shocked?