What about just a copy and paste into an HN post comment? What is the legality of that? What if someone who reads a share, and then pastes it as a comment?
While Righthaven LLC v. Hoehn did rule that copying and pasting an entire newspaper article is fair use, this ruling was vacated on appeal and instead the lawsuit was nullified because they ruled Righthaven never had the right to bring the lawsuit in the first place. So, yes, one can be sued for copying and pasting a newspaper article verbatim.
[–] strenholme 19 hours ago