Nah, this is complete rubbish. Creepypasta is exactly what it sounds like; An easily copy-and-pasteable story written to be creepy. This one in particular has been around for ages in some form, and without fail, every single one I've seen incorporates this little chunk (with a few alterations (pictures of ghosts rather than Unowns etc.)) :
So, this particular part of the pasta is debunked, which throws the rest of it into doubt.