Its called "Miserable User"... Im to lazy to actually write about it, so I'll quote the post. Heres a link to where I saw it, theres a download on that page. http://www.phpbbhacks.com/forums/viewtopic.php?t=51691
How evil. How utterly, inconcievably evil. .083% chance of only waiting exactly one minute to get to the page the first time. SO evil.
There was a vB versions of this ages ago. It was used on another forum I visit as it works better than banning people.