What do we owe the people who protect us from the worst parts of the Internet?

Whatever Facebook plans to pay its 3,000 new hires, it’s hard to think that it will be enough. Getting in the door at a huge, influential tech company may, in the abstract, sound like an exciting opportunity. But the new positions, which the social media giant will be adding over the course of the next year, involve a new and grinding kind of work: These people will join 4,500 existing Facebook employees in reviewing the grimmest and grisliest content posted to the site to determine what should be allowed to stay up and what should be deleted.