Entirely aside from ethical issues, there’s one nasty little secret about electroshock weapons - there are is a significant portion of the population whose nervous systems simply ignore them until the current is high enough to just kill them. In other words, neither Tasers or stun guns or cattle prods do much to them.
Well, they will knock a 250# hog to his knees.
If nothing else it would be fun for cops to zap Antifa punks when nobody was lookin’.