If you talk about private things routinely. If you deal with...

If you talk about private things routinely. If you deal with private data in public places routinely, sooner or later it's going to get seen by the wrong person. It can be horrendously dangerous. The risk might seem small but the type of circles that business people travel in means that the likelihood of the wrong person seeing that information or hearing that information is much greater than you'd think. Just because we're in an airport doesn't mean we're shrouded in a cloak of anonymity.