Connected through CDG going from AF to DL for the transAtlantic flight a few days ago. All on a DL coded itinerary. When we got to the gate at CDG, we were met with a security person at the line to get on the plane. He proceeds with an interrogation similar to this:

Did you pack your own bags? (yes)
How did you purchase your ticket? (with my credit card online)
Do you have your credit card with you? (I did)
Can I see it please? (I pulled it out of my wallet, but he didn't look at it)
What kind of work do you do? (professor at a university)
What university? (I told him)
Do you have a university ID badge? (Yes, but I don't have it with me)
Why didn't you bring it? (Didn't think I'd need it, I have a passport after all)
Has anyone given you anything to carry on board? (no)
Have your bags been in your control since packing them? (yes)
What university do you work at? (I told him again)
What is the purpose of this trip? (business, teaching at a conference)
Where did you stay? (The Nile Hilton in Cairo)
Do you have proof that you stayed there? (yes, I have the receipt)
What university do you work at? (I told him again for the third time)

I was traveling with a faculty colleague and she was given a similar interrogation. He insisted on seeing her hotel receipt and took it to show some security supervisor.

I am very used to the 2 or 3 or 4 questions about packing your bag, but I've never been asked about where I work, asked for my work ID, asked about where I had stayed or asked for proof (I wasn't asked, but my traveling companion was asked).

I am Platinum on Delta and have been gold or platinum for years. I'm a US citizen with a US passport. I heard this guy talking to the folks ahead of us in the line and he was asking them similar questions. I don't know if this guy was just very overzealous or if they are just being paranoid or what, but it was pretty crazy!