[ckuhl]

I think compared to the war on drugs, this would be incredibly effective.

Social media is all about network effects - the more your friends are on social media, the more you want (/need) to be on it to keep up with them.

Putting up a barrier won't stop _everyone_ from accessing the sites, but I feel like it will easily stop _enough_ that the network effect deteriorates and so it's not worth circumventing anyways.