How long before this story comes out on Twitter/social media?

Guardian has been gagged on a story including reporting a question in Parliament.  How long before the person(s) and organisations involved comes out?    A search on Twitter suggests those involved have already been discussed yesterday on the Guido Fawkes blog.  Apparently Carter Ruck the solicitors are trying to close down this mention on Guido Fawkes.  Why do organisations bother to try to close down stories through the courts - it seems an antiquated approach in this day and age?  Are any legal firms working with PR agencies to address these type of stories using social media?  It would be interesting to hear of any examples.