[fencepost]

If I post a comment about prostitution on HN, HN is not liable

Are you sure? And are you in a position to be making that call?

No jury is going to convict the CEO of Reddit because someone somewhere posted a comment about prostitution on a subreddit.

That's probably why Reddit eliminated basically all the subreddits related to prostitution. They're also probably less concerned about their CEO being jailed than they are about massive fines.

[220V_USKettle]

I think the biggest issue is having your domain seized prior to trial and conviction.

MX records are gone at that point, so the press cannot contact general counsel for comments.

[Y_Y]

I'd like to offer you my services as a prostitute, and also as a trafficker of humans.