> which means they must have looked at the photos to determine if they were attractive or not
That is quite an assumption. I can think of a ton of ways they could have an attractiveness measure without themselves digging into people's personal profiles. In fact, I did 5 seconds of googling and found this, which clearly suggests that they are asking other members to rate attractiveness of profile pictures: http://blog.okcupid.com/index....
> I know what people will say, they uploaded their photos to a web site and have no expectation of privacy.
They certainly don't have an expectation of privacy from their photo being seen by other users of the site. That's why they uploaded it! So what's the beef?