While I understand this is a (unsolvable?) problem, a bunch of cowboys from the DEA throwing their weight around is a terrible outcome. The last thing anyone needs right now is more regulation around core economic activities like shipping and e-commerce.
This is one way that the government forces businesses into law enforcement. Look for a settlement that has FedEx reducing anonymity, snooping in packages, and snitch...er, disclosing evidence to proper LEOs.