The USPS ad isn't completely baseless. We just recently did a virus cleanup for someone who opened up what they thought was a ticket confirmation for their boss in their email. Oops. (Their mail service provider apparently doesn't block zip files containing executables.)

There is a lot of confusion out there from people who aren't sure what is and isn't safe to open. The knowledge that we take for granted -- .jpg is safe, .vbs is not -- is completely alien to most computer users.

And then there are the scams. And yeah, people still fall for those, too: "But it said it came from my friend! I just thought they had gone on a vacation in France!"

We often get calls from people along the lines of, "I just received this message [..], is it safe to click on it?"

So in the real world, the marketing behind this ad is pretty sound.

On the other hand, we get deliveries all the time and USPS is by far our least favorite. Roughly half of items shipped by USPS are misdelivered at least once before they finally make it to us, if they arrive at all.