[TheAdamAndChe]

> when is it correct?

People differ in their opinions. It's clear that some media should be suppressed, like violent calls to action by powerful people. It's clear that some media shouldn't be suppressed, like videos of puppies. In between lies a vast gray area where it's less clear.

> Who makes that judgement?

People do, particularly influential people who make judgements and have the capacity to illicit the change required. Currently it's set by corporations, but the bounds of that are heavily influenced by and can be superseded by governments. That's why after the 2016 elections, you had all the hearings of the owners and managers of big social media sites.