I once received a postcard (as in, no envelope) with a picture of the product I bought, trying to bribe me for a 5-star review. The product itself was totally

I once received a postcard (as in, no envelope) with a picture of the product I bought, trying to bribe me for a 5-star review. The product itself was totally innocuous but I can imagine if that happened with something that was even slightly sensitive or embarrassing. Like, now everyone at the post office knows you ordered a Swedish penis pump along with a hardcover instruction book written by Austin Powers himself.