This article by "@AtlanticCouncil's Digital Forensic Research Lab", Spread it on Reddit (cache), illustrates how the author(s) found out about the Reddit (and associated) accounts driving political social media campaigns. They monitored the spread of a campaign that didn't really take off, resulting in much less polluted data about it's originators.
Via Joerg Fliege on G+.
Via Joerg Fliege on G+.