I had someone do that to me in one of the later phases of an interview process. They were doing some physiological testing after the technical part - and the p

I had someone do that to me in one of the later phases of an interview process. They were doing some physiological testing after the technical part - and the person kept diving into areas they should not have been asking about. I've been through enough interviewing/training on the other side of the table that I knew what was being asked was a bit no no. I finally called it out and asked, "you know you can't ask these types of questions, right?" They responded they were a contractor, so somehow them not working for the company made this all right. I was shocked to get an offer from them. I turned it down, as from my perspective, it probably spoke volumes of likely cultural issues with the company.