Well, screw you very much too, Facebook.

Here is a screenshot of the message I get whenever I click on Inbox messages, to read them, even if those messages (appear to) come from Facebook.

“You are using this feature to spam other users” (emphasis added).

As a programmer I am 100% certain this is a bug but I honestly hope that I’m not the only person who reacted to this error with a “Fuck you Facebook”.