"violent or misleading content that could lead to real-word harm"
"certain categories that, if posted directly to Twitter, are a violation of the Twitter Rules"
Sending of such a link, even in a private, direct message in Twitter may cause blocking of the sender's Twitter account.
LINKS
i Zernik, J., Julian Assange, Lord Carlile of Berriew, and the UK justice system, OpEdNews.com
ii Julian Assange: Wikileaks co-founder arrested in London, BBC
https://www.bbc.com/news/uk-47891737
iii Chatham House Rule, chathamhouse.org
(Note: You can view every article as one long page if you sign up as an Advocate Member, or higher).