Much like the hysteria on both sides of the debate, the examples you site are very weak sauce. Sure bud, it has happened, but people also have shot themselves in the head suicidally intent, and lived to give speeches about it later, but, much like your examples of how tazers and pepper spray are "ineffective". I won't presumeto know your experience, but I have never been tazered, not directly pepper sprayed, but I have been around both, and the likelihood of those methods not being effectiveis in the ballpark of slim to none odds....
Pepper spray, on a person, IDK, doubt it would fail completely, but on dogs it can be totally useless, I've used it on anumber of dogs (I'm a biker the MC kind ot BC, though I like bicycles a lot too) and it's next to useless with any dog that truly wants to **** you up IMO, just pisses them off more, but it can distract them long enoughto get away, I mean I was never actually bitten, but depending on the dog, I wouldn't wanna trust in that myself ever again, tho I have seen a lot of fools get the spray and not one of them any threat even if they have the ability to resist, the idea leaves their mind rather quickly
In the real world we actually live in,the only "resisting" someone with tazer prongs in them is gonna be doing is between jolts or perhaps if they PCP'd up first.... Or they get a one in a million miracle, or "god shot" as we call it in AA.
