Assuming this dirty cop...

a) Knows you're a pilot
b) Knows how FAA medical works (cops generally don't...)
c) Hates your guts

Yeah, that's possible. But as long as BAC is zero or negligible the FAA won't care. Also if the cop's dirty, he'll be looking for a "gratuity"... better pay up.

The grey area for us...

You can get a DUI with < the presumed BAC, if you can be shown to be impaired. If you drive after drinking AT ALL, you could in theory get a DUI well under the local limit if you can't recite the alphabet backwards while hopping on one foot and touching your nose with your eyes shut.

Safest way to roll is don't drink and drive.

Depends on local law. Pilots should probably assume the absolute worst case.

Everybody in aviation (and the military) knows that you can get a DUI for possessing keys in proximity to the car, nothing new.

So what happened, care to tell us?

Not sure why a cop would know/care that you're a pilot and want to ruin your life?

There is some real black hat stuff going on here.
Hmmmm.....

I can't do that sober, willing to best most others cant either

If you don't know, then mathematically the set is simple. Everybody but you.

This carrot-dangling is getting old.

Your inference here is that you know something everyone else doesn't (and you'll only tell it in tiny soundbytes). Enough with the childishness.

What if one encounters a dirty cop who shoots first and asks questions later? What if one encounters a dirty cop who pushes drivers off the road and into lakes? What if one encounters a dirty cop who plants evidence? What if, what if, what if?

You can postulate all you want. If the cop is "dirty" and the encounter is weighted and unfair from the outset, then what do you want? You've just become a victim. Are you seeking some kind of balance, fairness, or order here? Life ain't fair, mate. Life happens.

You're making a broad-based assumption that a charge of driving under the influence will destroy a career. This is a poorly informed and inexperienced understanding, and untrue.

Now why don't you come clean and tell the story, or end this can/mouse game?

Not an option in a field sobriety test. One can, and should, however, document, document, document. If an officer elects to freelance the test outside known standards or common procedures, it's subject to review.

At the time of the stop, however, compliance within the scope of one's rights is in order.

If rights are violated, that will be addressed later, after the stop is completed and paperwork done.

I am in aviation and I did not know this.

There are plenty of reasons a cop would know/care and want to ruin your life. They also have access to information that pilots generally do not.

Okay. Two of you, then.

A police officer does not know that you're a pilot. This is not information returned on criminal history, wants checks, driver registration, or vehicle registration. Do you suppose that a police officer checks at each stop for pilots? Do you think you're important enough for the officer to care?

There are plenty of reasons why an officer would want to know you're a pilot? Afraid you might pull a concealed boeing, or split-s your way out of a traffic stop? Arrest you for chemtrails? Just hates pilots and asks everyone he stops, in the remote off-chance one of them is actually a pilot?

Why do you think the officer might care? Plenty of reasons, you say.

Why would anyone care?

Wrong. I have never been charged with a DUI.

What if you were sleeping with the officers soon to be ex wife? What if you had agreed to meet her at say Dick's sporting goods to start an affair with her? What if her soon to be ex husband had a tag on her vehicle, on her cell, or reading her emails.

Suppose he had an off duty buddy follow the two of you? A private investigator? Its a hypothetical scenario and likely to happen in reality. This doesn't even begin to address potential meddling by a dirt bag employer with access to police or a relative working in the industry.

Think he might care?

You will never, never get past the Hogan.