Osama bin Laden in chat rooms? (Score 1)

I love a good rumor, no matter where it comes from... but the skeptic in me wonders how someone who spotted Osama bin Laden in a chat room could verify the identity of the speaker, especially if he's careful enough to be using encryption to start with. Same goes for emails... did someone intercept his private key, or is a public key with "Osama bin Laden" listed as the name enough to verify the identity of the writer?