An interesting article 'Espionage and Social Media', on The CipherBrief, a previously unknown website, but it is the author which made me sit up:
Michael Sulick was the director of CIAs National Clandestine Service ...
Link:https://www.thecipherbrief.com/artic...698jlM.twitter

Thread created for visibility; there is a larger, long running thread Social Media: the widest impact of (merged thread), into which this will be merged one day:http://council.smallwarsjournal.com/...ead.php?t=5954