User blog comment:SlenderVSJeff/Slenderman or Jeff The Killer?/@comment-3285977-20120828175515

There was a line of reasoning somewhere that posited that if enough people believe in something, that it can be made to manifest itself. There's also "life imitates art" to take into account. While they might not be "real" in the strictest sense of the word, they are certainly real enough within the hearts of many people.