Just don't add him onto the list. But he'll need to use one of them in case any of the staff needs to get in touch with him. It's faster than PMing someone.
Because it's an industry trade show. Only industry people. I just saw an ad in Computer Gaming World and I thought to myself "Why are they even advertising it in a magazine that the general public reads?" And ofcourse in fine print it says "Only industry professions allowed. This is strictly enforced blah blah."
Blockbuster already had to pay settlement costs because they were sued about their bullshit "No late fees" thing. I don't know if they've changed it or made it more clear.
Have you played Co-op yet? I hear that's pretty fun though I don't think I'd be interested in it. But the only reason I would want that is for the interviews.