>Elsevier alleges that “one senior library official has repeatedly pointed to illegal sources of articles, including a Russia-based piracy site.”
>We are unaware of any library employee who has been directing users to illegal sources of articles. On the contrary, UC explicitly published a statement on its website, in response to questions asked by users, that states: “The UC Libraries do not endorse the use of Sci-Hub for article access.”30 As the UC Berkeley university librarian said in a published interview, “we are unequivocal: it is our understanding (though we are not attorneys!) that Sci-Hub is in violation of U.S. copyright law. We will not advise nor help anyone to use it.”
By naming Sci-hub.tw, they're basically educating people that there's a way to get articles they want but it might be less than legal than some other methods.