Open Wireless Access Points
On a short walk with my WiFi enabled Palm recently, I was amazed to find so many open wireless access points.
While some of these are in residential areas, most surprising was the number of businesses leaving themselves wide open. Whoever had set them up had gone as far as changing the SSID to the business name (making it even easier to see where the signal was coming from) but had failed to enable even simple security.
No doubt, these businesses will have a firewall on their internet connection, but having an open wireless access point is like leaving the back door to the shop open.