Yeah this hack is for people with forums like mine (
www.bnfreak.com) with lots of kids that knows some things about computers and try to be funny by registering through a proxy and spamming. Anyways, doesn't work anymore with this ^_^
And if you wanna test it, just get a proxy (
www.stayinvisible.com is a good site for them), Avant Browser is the most idiot-proof browser for proxy support :-D and well, try visiting your forum, you should see a "No Proxy" error message.