So I posted about this on FB but figured I would put it here since it seemed like a number of people I've spoken to didn't know about it. Including me.
So there is an 'Other' folder in your FB messages that seems to hold messages from people that aren't friends or something like that. Seems almost like a spam folder. But Sara just told me to go check it and low and behold there were all these messages going back years from people and I've never seen any of them.
So, if you didn't know about it now you do. And if you did know about it, well then I feel stupid