More and more, as time goes on, people are leaving the MSM including reddit for these off-shoots and it risks creating separate bubbles for every group-think out there. This is what de-platforming and cancel culture does.

It's also not black and white. Sure 99% of us can agree that banning or de-platforming such horrendous stuff like NAMBLA is good. But MSM starts to push out and group non-extremists into the same bucket and ban them all, and you get where we are today, with a good chunk of society that doesn't listen to or trust the MSM.