One that scared the socks off of me waaaay back when was "The Stepford Wives". I could cope with the idea of a man preferring a robot to a wife, but setting up a community such that it would eventually happen to his daughter(s) too TOTALLY freaked me. (Of course I was a pretty weird kid, looking back on it...)
well if that scared you, maybe REVENGE OF THE STEPFORD WIVES would make you feel better hehe