Wired has the story of a man we first heard tell of from local anarchist Paul McCarrier after the G-20 protests: a man who used Twitter to communicate and help protestors rally against an organization he believes is a threat to human rights.
No, this isn't those Twitter-fueled Iran protests, which the State Department famously asked Twitter to delay site maintenance to support. This is an American citizen, on American soil, using technology to protest.
And, as both McCarrier and the Wired writer point out, the irony is clear and direct. If this was an Iranian being jailed, searched, his computers seized by the authorities for using Twitter in a protest, the Obama administration would be outraged and objecting.
But since it's an American protesting against the G-20, which includes the US, the feds are trampling all over his rights, including his patient-client privacy rights, because he is a social worker.