No seriously, how many people came here just to post that same silly "if you are broadcasting your data..." argument?
Slashdot should always allow you to moderate someone redundant (with heavy metamoderation) or allow people to mod themselves redundant, maybe a system to offer another poster all your child posts if you realize you are just repeating the same things.
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Aaaaaaany way, I don't think the government should have access to such info precisely for the same reason I don't want Google to have it and in fact, part of my complain against Google's data mining is that it enables governments to outsource fascism.
My policy is that, anything you don't want your government to do, or you don't want them to do without a warrant, you don't want a corporation to do freely either.
The "broadcasting your data..." is silly for reasons I won't get into in this post.