Thanks to protections enacted by "Section 230" of the 1996 Communications Descent Act [1]:
Section 230(c)(1) provides immunity from liability for providers and users of an "interactive computer service" who publish information provided by third-party users:
No provider or user of an interactive computer service shall be treated as the publisher or speaker of any information provided by another information content provider."
[1] https://en.wikipedia.org/wiki/Section_230_of_the_Communicati...