Are you going to suggest this solution to every mass media channel which turns out to have perverse or pathological dynamics?

Do you realise your personal actions in this case don't have any impact (at the margin) on the whole?

Are you willing to entertain that perhaps there's something in the function of Facebook (and other online sites) that leads to information flows with strongly negative social welfare outcomes?

(I don't have, and have never had, a personal Facebook account.)