As a prank in the high school computer lab, we would set the victim's browser homepage to ratemypoo.com
Wasn’t that Mark Zuckerberg?
/s
Seriously, I think hotornot was inspiration for Facebook.
It's even in the movie. Zuckerberg was inspired by Hot or Not and used his friend's chess ranking algo for Facemash (comparing college girls). And that inspired him in part for making the Facebook.