The post itself is scary enough but clicking on the links spreads the - whatever - to make everything still worse.
This sounds to me like what killed the journal and several comms belonging to a friend on LJ. He says it was due to having originally started his journal with a now obsolete email account which had been taken over by the hacker - or whatever. Not sure if it IS the same but just to let you know that we have no plans to close the comm so if you see such a post it's BOGUS and please ignore it.