Have you had training in what questions to ask in order to properly gauge a person's reaction to said question to determine the likelihood of that person to commit a crime or other undesirable act?

I would imagine in most cases the "WTF? Leave me alone." response would not mark you as anything other than a law-abiding citizen that's just annoyed with the process. They ask the horribly silly questions for a reason. Well, most of the time, sometimes you just get someone who's having a bad day or maybe just an overall jerk high on abusing his authority.