Hacker group rewriting Tumblr pages into a racist, anti-gay screed

Some Tumblr users are seeing their pages replaced with several dozen duplicate posts from a known hacker group, warning that deleting said message will delete the Tumblr page in question (it's unclear if this is actually true, but seems to be false in our testing). 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. The message from the gro...