"Yes, but 'sure meet you there' wouldn't be quite juicy enough to satisfy the 'that was not private enough so therefore it wasn't a private message' crowd."

The whole point of showing it next to a screenshot of the email or the message in the private inbox is to confirm that it is PRIVATE regardless of the actual content. There might be somebody out there who has an unusual interest in other people's private messages, but I think the vast majority of people are looking for something a bit more real than "this happened to me."