I'd be curious how they would be able to connect me to the online games I play as I never use or reference my real name in relation to my online names? I know that there are companies that will consider any MMO playing a ding against the candidate, so just posting in a "face to face" manner is not always enough.
I expect the .gov has tools at its disposal, should it choose to focus them on somebody, that can dig out things that a company doing pre-employment screening cannot.