Once you connected to the airport network (usually unencrypted, at least for the handshakes), what makes you think he hacker fifty feet behind you can't see your Facebook cookies, poison one of your apps, or do something that makes him access the juicy bits on your local email folders? And if you think 1% of the executives is careful enough or knowledgeable enough to avoid those kinds of traps, even in post-SabOx world, I do have a bridge or two to sell you. Espionage is simple these days; if your data isn't locked, it is not just yours.