What's more absurd is the assumption that they can stop child porn or sharing of anything "subjective" in the sense that it's a bunch of bytes difficult to dist

What's more absurd is the assumption that they can stop child porn or sharing of anything "subjective" in the sense that it's a bunch of bytes difficult to distinguish from other bytes without manual filtering. You just can't automate distinguishing between legitimate porn and child porn. Even if you could, you'll just drive sharing of such content underground, while trampling all over the personal rights of those doing nothing wrong. If they really want to address child pornography as a problem, they would treat it as a social ill/disease and go after the users instead of the platform. The goal should be reform that minimizes recidivism because it makes it easier to find those partaking in this content. At least with something like Facebook, they have a shot at identifying those sharing such content. Make it impossible to share on a widely used and understood service like Facebook and people will migrate to platforms that are much much harder to police.