Interesting case of abuse: Send anonymous death threats as secrets. Would be hard to prove the message ever existed without server logs. Also, botnet c&c messages. WikiLeaks leaks! Damn, this is a useful tool.

Also, unfortunate for anyone trying to share the secret over the internet: if a repressive regime is sniffing traffic and looking for these URIs and grabs the contents first they can still discover the messages of dissidents before they get passed on.