Yes, I think that testing these weapons on human beings would be completely unethical, and I can't imagine who would ever put their hand up to have those tested on them.
I don't think the science behind the taser is rocket science. It is for me, because that's not at all my thing. But there are people, and I hear from them all the time, who seem to have a base understanding of what's going on here.
I don't know if you've ever been to the website excited-delirium.com. Whoever owns that site.... Well, I recommend that you go there.