I was recently googling friends' names and looking at the results from find-people sites. It's already creepy enough that they have "related to:" and then a list of family members of that person. But the most recent concern was one site already has a "reputation score" like china has already implemented. I checked a few friends who had criminal convictions and, voila, their "score" ranked lower (and of course you can pay the site to remove your entry or whatever, aka a racket). Porn viewing could easily be ranked into the "score" in a negatively-impactful way and lead to job/social discrimination.