From SINSULL's post above: "I know some mail carriers who consider it a threat to National Security to paste a stamp on upside down."

'Tis because an incredibly large percentage of U.S. Postal Service employees are retired military. You know, put in your twenty or thirty years, retire as a colonel and start a second career, still with the government. If you think the military mindset goes away when these guys hang up their fatigues and put on Postal Service walking shorts, I've got a nice bridge in NYC that's for sale. It would be their "patriotic duty" to play cloak & dagger for Uncle Sam.

Fortunately, our house is 1/4 mi. off the road and the mailperson has never been down our driveway. UPS and the meter reader come back here, but I know them and they would probably tell Dubya where he could stick his TIPS.

Bruce