All I can say to that, is we used to zap ourselves for fun... it hurt like hell, but I'd take a quick jolt or 3 over being Pepper Sprayed or beaten with a club anyday.
Part of my training included the use of OC and mace and I have taken quite a few shots with a club during training. None of that compared to being tazed. That single shock was overwhelming.
While I see your point...that we should expect consequences for our actions...I would like you to ponder what it would be like if you wanted to protest against something/someone and they had a weapon that would completely nullify your efforts and render your actions as useless.
I think that using the tazer as a tool of compliance walks a thin line between our constitutional rights and the states rights.