[anamax]

Section 230 actually protects two groups, "interactive computer services" (Facebook, Twitter, et al) and users from liability wrt content that they get from others.

The "they can't do it at scale" argument applies to ICS, but why shouldn't users be subject to liability when they echo something?

We live in an approximation of the infinite monkeys with typewriters. It's relatively easy to find someone judgement-proof who has written pretty much anything that you'd like. Folks with huge audiences can use that to be as defamatory as they'd like without risking liability.

https://www.law.cornell.edu/uscode/text/47/230