I agree Paul, much more effective to set left / liberal dominated sociual media sites like Facebook kill themselves, in fact in the case of Facebook I believe it is already happening.
One of the things I have observed about the mindset of the left, both collectively and individually is it can only ever go further in the same direction. As they all start out on slightly different trajectories it can seem they are unified for a while but eventually they diverge (viz the cat fights in the LGBT lobby now between lesbian ‘real women’ groups and transgender activists.) This eventually leads to fragmentation and destructive infighting.
It will not be a quick death for the larger social media platforms, but it will be entertaining to watch, as the Silicon Valley billionaires are given ample time to regret their cosy relationships with national security agencies and certain politicians, the contempt for law and users privacy,, and the censoring of views held by about 50% of their potential users.