This new focus might explain why I've been hearing more of the "engaging" questions from TSA the last couple of trips, especially when I decline their invitation to remove my non-profile shoes.

I'm fine with "have you enjoyed your stay", "nice weather we're having" types of questions, but draw the line at some of the more personal questions like, "where's home", "are you on a business or pleasure trip", etc. Within the borders of the US, what would be the repercussions of declining to answer those questions that I felt were none of TSA's business?