I can tell you for a fact that some postal employees DO take notice of what people recieve in the mail, and DO report it to the authorities. I have a good friend who works for a government organization who I asked to check my name out of curiosity. It seems my bitch of a mailwoman filed a SAR (suspicious activity report) on me with the feds because there were packages arriving at my house in someone elses name. There are no doubt some very cool postal employees out there who probably don't care what goes through the mail, but there are also some who will put a permanent flag on your record with the feds for anything unusual.