LEOs have far more practice doing this 'Q and (non)A' than any of us. They know how to deflect a question with a question or a non-sequitur. I agree asking 'why am I...' is probably the preferred OCDO method. But you know they don't have to tell you anything not even what the RAS is. They can say 'your car matched...a bolo'. Also, you run the risk of being accused of trying to "legalese" the officer. I'm pretty sure cops hate lawyers and pseudo-lawyers (or LACs who know the law) more.
Good post, though.