Fluff Busting Purity (FBP) is a Greasemonkey Script developed for Facebook that gets rid of application notifications from applications like Mafia Wars and other oft-annoying Quiz messages, leaving your news feed populated with basic status updates, links, notes, pictures, and other standard updates.
"You will not use our copyrights or trademarks (including Facebook, the Facebook and F logos, FB, Face, Poke, Wall, and 32665), or any confusingly similar marks, without our written permission."
The FBP Facebook page was deleted minutes after the email was sent, which FBP claims is an unreasonably short amount of time, and that they could have fixed the errors, if there were any, given some more notice.
Lawyers then contacted FBP with a demand from Facebook to hand over the domain facebookplus.org, which they claim FBP owns. FBP denies this accusation.
Facebook recently released new code that will disable this script from running, but the scripters at FBP have created a patch to circumvent this, as well as create a new, working fan page.