Dating websites are, quite possibly, worse for our privacy than any social network ever invented. Consider this: A website like OkCupid can go much deeper than Facebook in understanding who you are, and what makes you tick. This is invaluable to marketers, and the government for that matter. I avoid dating websites because whose to say this data can't be used by others, such as insurance, employment, or the police? The following exchange from the television program "Person of Interest" I think is quite telling, albeit tongue in cheek, as to this threat: https://www.youtube.com/watch?v=DPirWp2oAJ4