Duality pointed this out and its perfect for dp http://www.vbulletin.org/forum/showthread.php?t=147280 What is it? This hack was designed to prevent users from using a web based proxy such as http://www.thefacebookproxy.com/ to circumvent a IP address ban. It uses javascript to determine if the current domain matches the forum's domain. If it does not match, then it redirects the user to the website of your choosing. If the proxy strips the javascript code, then the forum will not be visible to the user, and a error message will be shown. its good for those idiots who just can't help to use proxies to make more accounts.