I will be interested in how this plays out. I believe it's Section 230 [0] that allows US platforms to not be held liable. I'd be keen to understand whether this effectively bans social media (and comment sections?) from Brazil, or whether people need to click an I-promise-I'm-not-Brazilian button to access them.
[0] Not a lawyer so wikipedia is the best I have - https://en.wikipedia.org/wiki/Section_230