You shouldn't be using priority of any stripe, you should explain to the customer that their packages are less likely to be intercepted if they're mixed up with a larger volume of mail. Let them make the choice if they want to take higher risks. I even see people using signing for packages, WTF is that? The idea that speed is the key to avoiding a controlled delivery is going to become increasingly less and less true. Surveiling the entire mail system and running spot checks is one thing, but a much much smaller pool of mail only encourages the USPS inspectors to develop a new bag of tricks.People are carrying over bad habits from their pre-SR days. The game has changed and swarming packages is the best technique for the highest return and lowest risk.