I've been looking into this and haven't found a real answer, maybe there isn't enough to go off of yet, but say you order your "mail" to a PO box, and it were to get interrupted, say that you also have filed a change of address to that PO box a while ago, if a package gets discovered how do they go about this? Will they still search your house even though you're PO box isn't tied to it? Say you don't have a clean house, would it be ill advised to keep your contraband at your house with all your mail, illicit/non-illicit, being sent through a PO?
Basically will your house be seached if you order to a P.O box, and before people say if it's personal use they wont do a cd, let's say a person orders 50 blots of LSD which really is intended for long term personal use, which the law probably wouldn't believe whether it be true or not, now what? Or basically since LSD is a poor example since it's so easy, if you ordered what wouldn't be considered a personal amount of any schedule 1 even if it was just for storage purposes.