Sounds a lot like William Gibson's idea of The Ugliest T-shirt in the World from his novel 'Zero History' [See: http://www.viceland.com/blogs/en/2010/09/03/will

Sounds a lot like William Gibson's idea of The Ugliest T-shirt in the World from his novel 'Zero History' [See: http://www.viceland.com/blogs/en/2010/09/03/william-gibson/2/ http://www.viceland.com/blogs/en/2010/09/03/william-gibson/2...]. In it, a certain object triggers all cameras to stop recording normally, but its only implemented by a gentleman's agreement among security equipment manufacturers.