Baal already kind of did channel Wiseau, with that "Nyaaarh!" as he was ripping Polly's skin off his face.

My perspective is that Army of Darkness happened, but not necessarily in the way Ash remembers it.

You know how a tornado's actually an invisible column of air, and we can only see the funnel because of the dirt and debris it picks up? I'm pretty sure the Evil Force follows the same principle.

I think Jeff Konopka of "The Dead Air Podcast" had the right idea when he said It Follows isn't an allegory for STDs. It's an understated allegory for sexual trauma (thus giving "pass it on" a much darker meaning). Now think about the photo at the end of the movie. Sweet dreams!