A subversive way to send a message on Facebook.
You and your friends simultaneously leave posts on someone's Facebook wall. Once you "reserve" a block of posts, change your profile pictures to a letter, spelling out anything you want.
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Press & Criticism
The New York Times The 10 Things to Talk About This Weekend
The Daily Beast How to hack Palin's Facebook page
Mashable Anti-fur protesters take over DKNY’s Facebook page
All Facebook Pranksters ‘Letterbomb’ Beck And Palin Facebook Pages
Columbia.edu Newest Social Media III: Letterbombing
Reface.me 16 tips for an explosive Facebook Letterbomb
Wigg Party The Wigg Party took the concept and ran with it
Youtube Some weird Belgian short film features a Letterbombing scenario