My personal theory is they're all distantly related to the nitpickers in the world who saw the word "SEX" in the fluff Simba whomped up laying down in Lion King, and the people who saw a building shaped like a dildo in Little Mermaid.

I don't think Sam is being set aside for Castiel, but I looked at my old VHS cover recently, if that one tower isn't meant to be a dildo, it resembles one A LOT. :)