To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Share Embed Share URL Video File Node URL Embed Code <iframe title="MRC TV video player" width="640" height="360" src="https://www.mrctv.org/embed/106138" allowfullscreen></iframe> A United States Postal Service TV commercial urges people to use mail rather than email because "a refrigerator has never been hacked. An on-line virus has attacked a cork board."