Message Deletion

{warning:title=Warning} This is initial content taken directly from the mailing list {warning} Case in point - the OpenMicroBlogging protocol that supports it but it doesn't appear to allow for deletion of messages sent to federated sites.

It appears that while itself supports deletion of messages. This would have no effect on messages posted to federated systems unless they were only displayed as a link to the originating system (which the protocol doesn't appear to require).

Sounds like a pretty hard problem.