Well, when I looked up "Killing Children", I found two other creepers. The first on was the "Original" Killing Children.
Here's the artbook below.
The other Killing Children seem to be fakes.
These people may be trying to copy the player Scary Children. Scary Children is this player that dresses up creepy and makes scary artbooks and movies. However, she doesn't go be creepy to other people.
^Scary Children
^Lots of copycats
Em out~
