Something about the old tricks being the best tricks... Although it turns out the USPS does do some monitoring: http://www.nytimes.com/2013/07/04/us/monitoring

Something about the old tricks being the best tricks... Although it turns out the USPS does do some monitoring: http://www.nytimes.com/2013/07/04/us/monitoring-of-snail-mail.html?_r=0 http://www.nytimes.com/2013/07/04/us/monitoring-of-snail-mai...