I think the best defense is good security practices. * Always use PGP. * Don't order to your house. * Don't order more than 1 order to 1 drop. * Wait to receive an order before making more orders * Allow some time between when you expect the product to arrive, and when you pick it up (if possible) * Only order any amount that you are prepared to be caught with. * Don't open the mail straight away. * Write return to sender on the mail. * Have a plausible story to why your picking up the mail. * NEVER talk to cops, always ask for a lawyer Not all these will work for everyone, but you should at least have a plan in your head if the worst does happen