zlacker

You're splitting hairs here. Yes, I don't recall a leak specifically stating "we have sock puppets on US social media sites" however there have been documents leaked describing high level tactics which might logically include US sock puppetry.

Additionally, domestic US propaganda is now legal:

https://www.techdirt.com/articles/20130715/11210223804/anti-...

Further, sock puppetry is an established tactic:

http://www.theguardian.com/technology/2011/mar/17/us-spy-ope...

http://mashable.com/2011/03/17/centcom-social-media-personal...

http://www.fbodaily.com/archive/2010/06-June/24-Jun-2010/FBO...

So the only question is, specifically which sites are targeted and to what ends. If the metadata shows that HN or your favorite sub-reddit has out-sized influence on matters of national concern, then they're probably targeted.