There's talk of smartphone tracking, heat maps and social media trails that could put Canadians' privacy at risk. But with emergency measures, people may feel compelled to overshare in the name of the public good. How much should we be sharing with our governments? And when is it too far? Brenda McPhail, Director of Privacy, Technology & Surveillance Project at Canadian Civil Liberties Association, discusses the fine line that separates personal privacy with the pursuit of public health.