Read the ‘Beware of public Wi Fi’ advice under ‘Resources’. Re-enact using public Wi Fi at the local library where a malicious individual using specific software to intercept your data is lurking. Act out the consequences of this information being shared.
Be wary of public Wi-Fi
(Don’t use public Wi-Fi for doing sensitive things like online banking or social networking).
Most Wi-Fi hotspots do not encrypt information and once a piece of data leaves your device headed for a web destination, it is "in the clear" as it transfers through the air on the wireless network. "That means any 'packet sniffer' [a program which can intercept data] or malicious individual who is sitting in a public destination with a piece of software that searches for data being transferred on a Wi-Fi network can intercept your unencrypted data. If you choose to bank online on public Wi-Fi, that's very sensitive data you are transferring. We advise either using encryption [software], or only using public Wi-Fi for data which you're happy to be public - and that shouldn't include social network passwords."