I live in a small town and recently made a trip to the big city.. I was absolutely amazed at how many advertising campaigns are based on fear. I had completely forgotten about LifeLock, Life Insurance, Home Security Systems, Health Insurance, Car Alarms ... etc. etc. Seeing ads that say "Buy this or else..." completely shocked me. It appears to be quite the norm these days.
Why? Those products only exist because bad things can happen. Of course their advertising campaigns are going to remind you that bad things can happen.
USPS's business model has nothing to do with safety or security and thus it is shocking to see them using fear to sell their product.