(Pardon this disturbing subject interfering with your Friday night rest and my (very necessary) throw away account.) A year or two ago I started an image sharing site that's been modestly successful in terms of traffic (a blessing). No money or fame, but it's nice to see movement. I try to filter user uploads to at least classify the sexual stuff (80% of it) as nsfw and feature good stuff on the homepage. This is excruciatingly time consuming with 6000 galleries posted per day, but I suffer through it as I can. Sadly, I've noticed a huge amount of extremely taboo photos on the site. From rape and bdsm, which I can kind of tolerate, all the way to extreme child porn. The latter is extremely disturbing. Amazingly, these people post this openly. I never see the press talking about the nsfw side of Youtube, Tumblr, Reddit, Imgur, and others. How do those sites deal with this problem? What kind of content filtering systems do they use to keep the visible parts of the site clean? How many interns are flagging photos all day long? Is it wise to allow these pages to be indexed? What's my legal burden under Safe Harbor? And.. more importantly.. how does the organic traffic in the nsfw sections play into the strategy of these huge user-generated content sites. NB. I've attempted to build user profiles and a kind of self-moderation system, akin to how Reddit flagging works, but my users seem to be mostly interested in "one thing," and no community-focused members have emerged so far. I still have hope, but need a solution that I can use now.