Why is the blame on people for what is made available to them? This wouldn't be 'protecting people from their own mental and moral malleability,' this would be preventing others from making this which abuse those malleability for profit.
The same type of argument you have made here could be made for legalizing ponzi schemes. People _should_ know that there is no quick rich scheme and the history of these schemes are full of fraudsters. Is it wrong to ban this type of abuse because their victims made the choice to engage in the first place?
And, to preempt the "ponzi schemes are different" response, I ask for a response of this type to qualify it with how those differences matter.
- If it is in legality, that only applies until a law is made about addiction-intended media and is circular (it is wrong because it is legal <--> it is legal because it is wrong).
- If the difference is in the intent of the ones perpetrating it, both perpetrate primarily for monetary gain. I don't believe a ponzi-scheme's primary intent is ever malicious (with the qualifier that I'm not assuming pursing monetary gain is malicious in of itself), nor do I believe this about social media.
- If it is the directness of ponzi schemes in their fraud versus social media, I don't view that is very relevant... I think it would be reasonable to not blame someone for being the proximal cause of an issue if they didn't know beforehand, but the abusers in this case know by now that they are at _least_ a proximal cause.