This Facebook themed shower curtain isn't creepy because of the graphics or text printed on it, but rather because it assumes you'll have people spying on you while you take a shower!
And, while it may be meant for couples or roommates comfortable with sharing their shower time with others, I'm sure even in those situations it would get old quickly, prompting them to wonder "where did you put the plain old shower curtain I used to know and love?"
http://www.spinninghat.com/product/social-shower-curtain --via Geekosystem