Now the Wall Street Journal reports that those cases are just the tip of the iceberg of a larger DHS surveillance program targeting social media users nationwide. DHS has used, with varying degrees of success, administrative subpoenas and grand jury subpoenas to unmask social media posters, according to the new report. There are, of course, some actually concerning threats online — and some subsequent convictions — but the scope of DHS surveillance program seems to go well beyond true threats. The WSJ attempts to put some numbers to it (emphases added):“To unmask anonymous online critics, DHS has sent hundreds of subpoenas to social-media companies, according to people familiar with the matter. Its agents have tracked down Americans at work and on the road, asking them to sign letters acknowledging their online speech about ICE ‘may’ be a crime.”