I was jump seating on an Airbus and an FAA guy had the center jumpseat. He was really friendly, put his cell number on his biz card. I thought....man, I have a friend at the FAA. This post reinforced my concern with regard to his kindness... Never let you're guard and professionalism down regardless of how nice and helpful they seem. They have a job to do and may use creative tactics to reveal issues. Never!!