Are you sharing your most personal information with everyone?
Wireless networks are a shared medium that is broadcast via radio waves. This means that unsecured data transmitted by wireless users can be captured, making sensitive information (such as credit card numbers and passwords) transmitted wirelessly inherently insecure.
It's important that you take additional steps to encrypt and protect sensitive information that you send over a wireless network. And that means anywhere you connect wirelessly; like on the Campus wireless network, at cafés or even home wireless networks.
In general, offers of "free" service from an unknown source are often too good to be true. Be wary of connecting to unknown wireless networks. Hackers do setup fake wireless networks (or "evil twin hotspots") in an effort to capture the information you are sending over wireless networks. This is even more prevalent due to the ability of the latest smartphones to act as wireless hotspots. Using that "Free Wireless" network you see out there may actually come at a very high price.
If you have a wireless network at home it is important to secure that network so that an attacker cannot use your network for nefarious activities. There have been multiple cases where insecure wireless networks have been used to carry out a crime, and initial blame has fallen on the wireless network owner.
Use Wi-Fi Protected Access (WPA2) with a strong password to make sure only you can connect to your wireless network and that no one can eavesdrop on your wireless network.