Your 99.9% claim is specious at best, backed up by no scientific data. In addition, I have never claimed that "all" officers are under trained and violate their oath to the Constitution. Even though one is one too many in your profession, I'd say the number is closer to 10%. That is, 10% of cops aren't worth a sh** and have no business carrying a gun or a badge. I think even you and grand would agree with me there.
But let's talk about what we know. Cops are getting hits on target about 30% of time they fire their weapon. That is embarrassingly low. Most of them are okay at double taps on a stationary paper target at 5 to 10 yards, but when it comes to truly fighting with a pistol, they are woefully inadequate. With the process it takes to become a law enforcement officer, it's amazing they can't weed out these idiots. I'm starting to see a pattern -- and as a law-abiding, taxpaying citizen who has never been in any trouble with the law (not even a traffic ticket) I shouldn't be questioning the actions of law enforcement. Hell, not too long ago a San Antonio cop cuffed a 19-year-old girl and raped her in the back of his patrol car. Where the hell are you guys finding these morons?
In sum, I think it's safe to say you have a 1 in 10 chance of running into the bottom of the barrel in law enforcement when confronted by someone with a badge, and that's not a chance I or my family is willing to take. One of the first things my children will learn when they're old enough to understand is to never speak to a police officer. If confronted, request a supervisor, then a lawyer, and keep your mouth shut.