I'll try, but I don't know how I can be more clear than I already have been.
A person who pepper sprays a cop will get a response ranging from closed hand techniques (punches)/use of impact weapon, use of taser, and possibly even deadly force.
In the police academy, one is taught that if someone incapacitates you, they get your gun and you die. When officers are trained in pepper spray, they must be sprayed and fight after being sprayed. This is to train you for this very scenario. Typical pepper spray training involves being sprayed and then fighting off the bad guy, with it being pointed out that you CANNOT AFFORD TO LOSE because your gun is at stake.
The bottom line is this, as you eluded to: Pepper spraying a cop will initiate a very violent, life or death, fighting response from the officer. That is for good reason. You incapacitate him, and he has to assume you are going to get his gun.
I don't want to say enough to out myself or who I work for, but we recently had a scenario in which a guy grabbed an officer's taser - not in a Wal-Mart parking lot, but in a well populated public place. The guy tased the officer and the officer shot him. Guess what? He's already been cleared by the prosecutor and grand jury. It's a good shoot - for good reason.
As you and others rightly point out, there are absolutely circumstaces in which I would hesitate to go to the gun in such a scenario. My initial statement was this: "You pepper spray a cop, you are going to the hospital." I wasn't referring to retribution. I was referring to the reaction that you are likely to get, which, again, to reiterate, is likely to AT MINIMUM be him coming at you with fists and possibly a baton. Doesn't that sound to you like something that would land someone in the hospital? As I said, that would likely be the MINIMUM response, with the maximum being much worse than that.

