In "Going Away Present", Patrick reveals that he can easily imitate Michael's voice and mannerisms. With that in mind, how many times during the series were we actually watching Patrick, when we believed we were watching Michael?
According to HABIT, Patrick is actually an ancient being who adopted a fake human identity and inserted himself into a human family, causing mayhem and strife, until his parents could no longer handle his "issues" and sent him away — thus allowing his malign influence to spread outside their family. Now, what does that sound like? A changeling.
Add that to the fan theory that Slender Man himself may be one of The Fair Folk, and it provides a whole new layer of Fridge Horror.
