You ordered with tracking?
You know that a website which can display tracking information is going to log IP access to it, right? I would wager that they have an audit database tying IP addy to tracking #. Your use of this system could be used to connect you with the package even if you take no affirmative action to accept the delivery.
Let me just go into a little detail here about the level of "anonymity" you have on the internet.
I'm assuming you use an ISP and not a public computer such as at a library or internet cafe. Your ISP keeps track of your connections and what IP address they issue you. When you connect from this machine to the USPS website and say "show me tracking info for package #1234567," it is far more likely than not that USPS is auditing your IP address and connecting it to a request to track package #1234567. This audit trail would be held for a limited time, due to storage constraints. Assuming you were a "big time terrorist" or something like that, law enforcement could get warrants to have your ISP give them your connection traces and get USPS to give them the audit trace for this package. If I were sitting on a jury, this would probably convince me that you owned that package.
For anything that you want to deny ownership of, you must not do shit that connects you to the it. An order placed via email to a foreign party would be beyond the reach of typical US law enforcement, but actions you take subsequent to that must be considered. Given your quantities, it's obvious that you are dealing and this will inherently raise the level of scrutiny you are placed under vis a vis smaller shipments that would be typical of a mere user.
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