The article “Wireless Identity thieves” really made me realize how easy it is to access wireless networks not just your neighbors’ wireless network devices but also wireless networks belonging to major corporations. Nation - wide corporations like Lowe’s, TJ Maxx, Marshalls apparently had open wireless networks that allowed criminal hackers access into their networks that carried credit card information and eventually stole anywhere from 50 million to 200 million credit card numbers. Even though there is no guarantee that you will be safe, it is recommended that you should encrypt your wireless network, home, or office, and if possible restrict your wireless to only work with the MAC addresses or devices you own. Layering WEP, WPA or WPA2 with MAC address permissions and stealthing one’s SSID can further keep your home network safe.
http://reviews.cnet.com/4520-3513_7-6733602-1.html
http://www.wired.com/science/discoveries/news/2006/07/71358