All the films are brainless.
But... fun? Do you enjoy people trying to rape your head? In this case, for money? Really, I think that kind of thing comes down somewhere in the region of Contempt for your Audience.
Though the first movie was just silly and bland. I'll let that one off the hook a little- it wasn't aggressively awful rather than extremely underwhelming. Which even puts it ahead of The House of the Devil in my book. That's got to be worth something.