CNN reporters flew low over LA in 2 small Cessna's with Wi-Fi scanning software in their laptops to see how many home and business access points they could find that were wide open (unencrypted).
They found over 4,500 of them. What was surprising 70% were wide open accessible with no encryption protection at all which means all the computers down below were fully accessible and they could have sent e-mails through those accounts or uploaded CP, terrorist stuff, etc. without the people down below having a clue.
Really proves people are so technology stupid and clueless.
Here's the full story link at CNN Online:
http://www.tomshardware.com/column/20040430/