Get upside-down-ternet instead

http://www.ex-parrot.com/~pete/upside-down-ternet.html

I laughed myself silly when I found that someone decided to have fun with the squid proxy and his neighbors. He found that (*gasp*) they were logging onto his wireless connection and hogging the traffic on his broadband connection. So he decided to give them an entirely different Internet experience: all your pictures are belong to upside-down! HA HA HA!

Now when someone logs onto his network, he lets them surf the web, but their connection results in their pictures being shown upside-down via squid.