Similar Booz story: I took an interview with them while with a competitor. I had no real interest in the firm, but was interested in what they had to say and offer for competitive intel. Ended up having a great interview with the guy who ran one of their larger accounts, who happened to be one of my clients at the time. Got a phone call from their recruiter that evening who was excited to offer me a position at a 30% pay cut and a more junior title. She didn't understand my confusion, tried to convince me that "our managers are basically partners at all the other firms", and eventually got the picture when I started laughing.

I think it was also Booz who tried to get me to tell them confidential compensation information because, quote, "C'mon, I'm not going to tell anyone."