I believe the implication is because of being monitored online. At least that is the light in which I viewed.
With the smelly one having a cyber czar, etc. and already listening into phone conversations more than the legal limit and given his propensity to become a fascist dictator I do not trust him. He wants the details secret why is that?
http://politics.slashdot.org/article.pl?sid=09/05/06/2148217
CALEA (keyword search here or on a search engine elsewhere) will tell you more than you want to know about the paranoid truthophobes monitoring and lurking already.
For our safety, of course.
That’s not to disparage all DHS and related people! There are noble people trying to use technology for good. (Paging Curt Weldon/ABLE DANGER.)
And for those heroes, it’s a shame they find themselves hamstrung by the ACLU and its ilk.