I dunno man. Have you seen X: the man with x-ray eyes? It's fun at first, scoping out the chicky babes and whatnot. But eventually you'll find yourself seeing things man was not meant to see. Things at the edge of the universe... not good things either.
Haven't seen that one, I must check it out! I suppose the problem is you can't close your eyes or even put your hands over your eyes if you see something unsavoury!