Nothing would shut a clueless cop or security guard up faster than a Department of Homeland Security Photography License authorizing the bearer to operate a still or video camera in public.

Created by San Francisco designer Matthew Williams, who is now legally allowed to photography anything he wants in public, the licenses are a must-have for any shutterbug.

The licenses were created in the wake of last week’s incident involving a fare cop on the San Francisco Municipal Railway.

Williams has uploaded the master file in case you want to make your own, which pretty much limits the license to designers or people with Adobe Illustrator who understand EPS or OCR.

Otherwise, you’re SOL.

Thanks, Rick.