Twitter has shut down a scam appealing to people's paranoia.
It involves direct messages to members asking "have you seen what this person is saying about you?" followed by a link to an internet page.
They purport to be from genuine users of the social networking phenomenon - including TV3 reporter Tony Reid, in whose name a message was sent this morning.
Reid has since sent a message to followers saying he felt "violated" by the use of his identity.
He wrote: "I've been hacked or spammed or something.... please ignore all direct messages from me...."