Airport wireless networks lack safeguards
 

"At San Francisco International Airport, for example, Rushing picked up an unencrypted WLAN broadcasting the file directory of a Windows NT server and numerous PCs belonging to Northwest Airlines Inc. Rushing said the LAN was set up in such a way that a hacker could have used the available information to learn the network's topology and steal passwords."

http://www.computerworld.com/industr...,74271,00.html

Well I was on a train between Reading and London and picked up 233 networks, 218 of which were insecure. Two of those were medical establishments......