Well this is tough.
See on the Force Continuum (back to my LE days here), there was "soft hands" (restraining techniques, attempting to move subject via pulling/pushing or pain compliance methods) and "hard hands" (striking the subject unarmed).
Simple non-cooperation (referred to as "passive resistance") typically warranted 'soft hands' on the force continuum. If you couldn't move a guy alone, you got someone to help you.
Choke holds were once considered a soft-hands restraining technique... then it was determined that choke holds could be fatal and they were reclassified as hard, then most departments banned them.
"Active resistance" is when the subject pushes officers away, etc, but isn't actually trying to hurt anyone. In my day, this was the borderline between soft hands and hard hands techniques, or possibly OC spray.
"Fighting" is when the subject is trying to hurt you to resist arrest. Now this was when you could beat his ass, spray him, maybe even use the baton on him.... but still focusing on LTL (less than lethal) methods.
Now at first I figured the Tazer was for dealing with fighters, but apparently it was quickly applied to Active Resistance as well, and in some cases just Passive Resisters. The latter surprises me, since Tasering is fatal once in a while.
PD's love their Tasers. On the whole it cuts down on officer injuries and perp injuries, reducing liability and insurance and lost-time and so on. (Mostly economic see).
I think they're getting a little too Taser happy when they use them on Passive Resisters tho.
But what do you do? Government and law are Force. When someone refuses a law and is told they are under arrest and won't go, you MUST make them go. That's the job.
Personally I think the best answer is.... don't have so many stupid-ass laws. Recognize that ANY law, when faced with citizen non-compliance, may result in violence and perhaps death... and then be a little more restrained when it comes to MAKING law.
That, and maybe we need a better system in place, something more independent of the justice system as it stands, for determining when an officer has exceeded his mandate in force.