For most online companies that allow user-uploaded content, keeping offensive stuff away from customers’ eyeballs is a full time job. Content algorithms and user flagging only go so far, after which the websites either turn to internal departments or to outsourced companies.
The job description for these human-powered filtering services–review offensive imagery and get paid!–can almost sound like fun, if you assume that “offensive” just means pornographic. In reality, the content under review spans everything from animal abuse, to sexual violence, to murder.
Actually, he isn’t joking.