This is criminal in my opinion. Law Enforcement requires that you act differently. As I said while talking with some friends, You just can’t act like your buddies at the bowling alley. And this means you cannot write a letter demanding that a business do what you want them to do or else you would boycott them.
This is using your position of authority to gain special treatment or favors. In Michigan this would be a 10 year felony.
On the flip side; Any current or former employee has a free get out of jail card for everything except major crime. This letter provides the perfect backdrop for a defense for traffic tickets and even minor criminal investigations. I know that I would play this card if I were the company.
I am not the only LEO who thinks this way. Unfornately, too many think that this action was appropriate. There are too many in law enforcement that should not be there.