You're a bad actor who is brainlessly stuck on 'needing' YOUR version of proof as a way to frighten people away from using a zapper, because they should believe you that such proof should be 'available' and 'necessary'.
So I'll tell you what. You get parazapper his approval from the FDA to do real conclusive whatever kinds of proof you need (if you can), possibly wasting a cool million or so bucks in the process, and finance what equipment is needed (probably the FDA dictates that to get their brother-in-law more money) for these 'proofs'.
Go ahead, you can get that innocuous 'proof' delivered to your door, I'm sure. Most local inventors don't have that kind of money, so the research remains undone. Just think you could be the one rewarded for finally getting the 'proof', one way or the other. You'd be a hero!