[quote=mbl]
Seemed like a reasonable confusion to me. When thinking in terms of the conversation being its own entity, not just logs in separate inboxes, it seems possible that one person deleting the conversation would mean the other would be unable to access it. It was just a simple confusion that didn't really merit a post mocking it.
[/quote]

As I said in my post, I approach PMs like email. Each person has their own copy of the conversation, so whatever I do to mine shouldn't affect someone else's.