Okay...Who Are "The Hamiltons"

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Has anyone ever seen this movie. It was part of a movie Horrorfest. It's tagline was "An All American Family." I just watched it on tv last night/this morning and I didn't think it was really all that great. I thought it was pretty cheesy, and tongue in cheek at moments. But I have one question about the movie... Who/What are they? Are they like, vampires or something? At first I just thought they were cannibals, but than...what's with the guys teeth at the end? That made me think vampires...