Sounds like social media platforms might end up like cigarette companies, where they finally acknowledge the harm of their product and add a disclaimer to avoid liability: "This product is designed to manipulate you. It will probably make your life worse." Or, like the drug companies: "If you have depression, suicidal thoughts or find yourself screaming at some rando on the internet, stop taking Facebook and consult…
This is pointless for social media. It won't stop people from using these things because too often it's the only way to talk to family and friends. Even their jobs could depend on it.
Just ban advertising in general. They're the ones enabling all the evils in 21st century digital society. This will take care of social media, surveillance capitalism and more in one fell swoop.