Greenwich Time reported last week that the mother of Victoria Soto - a teacher killed while trying to protect her students - had said she had previously failed to convince Facebook to delete some of the pages.
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).