I believe there is a double standard here compared to section 230 of the communications act.
Platforms can't be held liable for speech on their platforms for a reason. For full disclosure: I feel ambivalent about that.
I don't know of an equivalent legal protection for I2P-like infrastructure.
You feel ambivalent about eg. HN not being held liable for some random user signing up and posting, say, a terroristic threat on it? You realise that if platforms/HN were legally punished for that, no website could accept user content, ever, and you are effectively suggesting the end of public communication on the internet?