Originally Posted by DirkDiggler

First they need to file a cause of action, and specify damages. They cannot just go to a judge and state, "we think something is going to happen, please help us!" They will get laughed out of chambers. They will have to wait until something actually happens causing them harm.

They are probably sending cease and desist notices hoping the organizers of these websites get scared off and go away. The legal system unfortunately does not work with that kind of speed or efficiency. Courts are inundated. Professor no, law student in a law office on days off, yes.