Regarding Q's message about SecureDrop: this reminds me of the JournoList scandal from 2010. Ezra Klein's email list became a way for the Mockingbird media to coordinate their message. Linking to Gawker because that is where Guccifer dropped the JournoList archive.
gawker.com/here-is-the-archive-of-the-famous-liberal-media-journol-530195415