I thought many here who file Open Records requests may be interested in this since the DHS is now targeting advocacy groups which would/could include gun rights groups or groups advocating Open Carry.
https://www.eff.org/deeplinks/2010/10/dhs-singles-out-eff-s-foia-requests-unprecedented
https://www.eff.org/deeplinks/2010/10/dhs-singles-out-eff-s-foia-requests-unprecedented