ZDNet just ran a story about the 374 keywords that the Department of Homeland Security (DHS) monitors on social media sites. The list apparently was released some three months ago as a result of a lawsuit filed by the Electronic Privacy Information Center (EPIC). It was part of the Analyst's Desktop Binder of the DHS National Operations Center Media Monitoring Capability.
The sub-list dealing with cyber-security includes the words "phreaking" and "2600."
To all the old-school phone phreaks I interviewed for my book who were worried that the government still cares about this stuff and whom I reassured that the government couldn't possiblly still care: ok, ok, you're right and I'm wrong.
Just don't tweet about it and you'll probably be fine. :-)