zomg Bitmonger and I were just talking about this yesterday.
Schneier: Steal This Wi-Fi 'cause we'd like to provide an Open Wireless Network as well as have our secured one. We've done this in the past, and we just feel as Schneier put it that it's polite and neighborly. But, we were also concerned about the liability reasons he lists as well. Hadn't really come to a conclusion, but hearing one the foremost Security gurus of our time discuss the issues and come to the conclusion that it's still ok to do is v. reassurring.