The insecurity of public wifi
If you don’t think twice about jumping onto whatever inexpensive or free wireless network is available—in airports, bookstores, and coffee shops, or even mooching off a neighbor at home—consider this: if it’s an "Unsecured Wireless Network," it’s just as easy for a criminal to get on it as it is for you!
Unsecured wireless isn’t encrypted, so scammers could easily be logging the sensitive information you send over the network, such as logins, passwords, or credit card numbers. Plus, in a public place, someone could also “shoulder surf,” watching over your shoulder as you type.
So, avoid conducting sensitive CTS or your private business on public wireless.