Self-enforced, the same way the media no longer glorifies teen suicide because of the risk of suicide contagion: https://en.wikipedia.org/wiki/Copycat_suicide#Journalism_cod....

There are norms the media choose to follow on their own accord.

Think for example how suicides are generally covered. Reputable organisations don't publish the details of the precise method, and they include a link/phone number to a help line for those who struggle themselves.

> What is the punishment if you break it?

The same as with most norms: Professional embarrassment, and loss of reputation among your peers.

Someone responsible for a news organization can choose to set the policy. Maybe everyone can stop retweeting this stuff and engaging in a flame war online. Or stop consuming articles and videos about this incident. Not every problem can be solved by the state.

There are already plenty of laws blocking certain kind of information from news. Minors that are crime victims for instance.

It's so realistic that it's already a real thing.

> Enforced by whom? What is the punishment if you break it?

The government. We need a comprehensive set of media safety laws that prevent publication of these dangerous reports so they won't fall into the wrong hands.