See, there's no software algorithm that can detect nightmarish depravity and just flag it automatically (if there was, it would have gained sentience and become a serial killer by now). Thus, there are real jobs like Internet Child Abuse Moderator that have to be done by actual humans, and it's just as horrific as it sounds.
It's actually the law: In 2008 the government started requiring tech companies to scrub their own platforms for illegal content, which meant hiring people to sit and watch children being raped and murdered for hour after hour, day after day. How in the hell would they even recruit people for a job like that, since anyone too eager to do it probably owns a toolshed full of corpses? In some cases, you can just get assigned to it, whether you like it or not.
That's why former members of Microsoft's online safety team Henry Soto and Greg Blauert are suing the company, claiming that their untold hours spent staring at "indescribable sexual assaults," "horrible brutality," and "murder and child abuse" have stricken them with a case of PTSD so severe that they now can't touch a computer without triggering a panic attack. To be fair to Microsoft, the company did offer counseling and strongly encouraged both men to alleviate the stress by taking smoke breaks (because future emphysema is a small price to pay for today's continued sanity) or playing video games ... after which, Blauert says his supervisors dinged him for "lack of production and too much time playing video games." We wish we were making that up.