Generally I don't have this problem but I'm living in a place where my post MIGHT get opened. I'm not really afraid of the customs, but of people living with me asking what the fuck have I ordered.
From the title you can guess I want LSD and I live in the EU. So what vendor should I choose that even if someone opens the envelope they won't expect it to contain drugs?
PS: Kudos if the seller accepts multi-sig.
Who the hell opens other people's mail? Get a PO box or move out.