Beyond merely guarding the entrances to your house, he shows how the software can keep a detailed log or send text message alerts every time any door in the house is opened, to monitor practically every activity in the house.
Tumblr confirmed the ongoing issue to us this morning, and warned users who've seen the message to "please log out of all browsers that may be using Tumblr, " as that's one way the "viral post" is being spread.