Any idiot knows that controlled substances can't be left in an unattended mailbox... which is why the US Postal Service offers priority mail. The postman knocks of your door and, if you fail to answer, leaves you a slip on further action. Walgreens does not even carry some controlled substances such as oxycontin (see my numerous junkie pharmacist posts for background) so where is their advantage? What... no advantage? Hahahahaha!
You would know that DHL and UPS are the normal carriers for CMX because you used to work there, but you know NOTHING about drugstore.com and you know nothing about business except your parochial view of pharmacopea from the mileau of your puny pharma-cubicle.
I am in the business of making money. Obviously, you are NOT!