I know that a lot of people in China travel around quite a bit, and with all the cool stuff apple has come out with lately, everyone is using wifi. The airport, the internet cafe, work, the dorm, school. There are tons of places where you can get connected to a public wifi zone.
Recently a new firefox add-on called "Firesheep" is doing some nasty stuff.
In the past, hacking was for the nerds. It was for the baddies trying to steal stuff, make money, and make trouble. Ok, every once i a while some guy pulling a prank would hack some site for fun, but usually, this kind of stuff was for the professionals.
Now hacking has become automatic. With this Firefox add-on, any idiot can "side jack" or HTTP session jack your private information.
Emails, passwords, Facebook information – all with the click of a button – if you're on the same wifi network.
The good news is that with a vpn, this can't happen. Remember how a vpn codes your information? Protects you
Remember how a vpn changes your IP address? Protects you
Remember how a vpn make The Great Firewall think you're somewhere else? So will these nasty Firesheep douchebags.