When I'd make inquiries as to why these seemingly arbitrary decisions were being made with regard to such donations, the reasons given were usually along the lines of: 1) a perceived guilt by association; 2) the taint of illicit money; 3) the possibility of it being perceived as a "quid pro quo" agreement.
Well, let's look at some of these "inhibiters."
"Guilt by Association": Look, maybe you don't want your troops patronizing gentlemen's clubs on duty. I get it. But face it, when it comes to community standards, if your local economy is able to sustain no less than seven strip clubs within a three-mile radius, I don't think you have to sweat Carrie Nation storm-trooping your desk area anytime soon. Besides, the idea that a department obliged to deal with such crimes as money-extorting deputies, commanders and chiefs getting DUIs, embezzling narcotics investigators, abusive jail custodians, and even accusations of murders committed by sworn personnel might really sweat being vicariously associated with a clothing-optional establishment just seems dumb. (True, I might not make a point of alerting the local community paper for a handshake photo op...But I would take the money.)
"Taint of illicit money": First off, such businesses already pays taxes, taxes that help pay municipal salaries. So we'd just be cutting out the middle man. And let's not ignore how many billions of dollars Americans spend annually on illicit drugs. Is it not fair to acknowledge that here in Southern California we law enforcement officers generally only get the low-level users in custody while routinely being expected to turn a blind eye while working security at those various premiers, parties, and awards ceremonies wherein celebrities parade around with blown-out pupils? And outside of Hollywood, do you really believe that many of your top corporate CEO who are putting in 80-hour work weeks are doing it all on decaf, soy lattes? Have you not heard the many tales of how much of our circulated currency carries the taint of illicit drugs?
So guess what? It's ALL dirty money (Can I help your piously delusional self off that high horse now?)