Periodic reminder that the "Direct Message" / "Private Mention" function here is dangerously broken with confusing semantics.

- Anyone mentioned *anywhere* in the body of a PM gets a copy.

- "Disabling" PMs in your profile merely means YOU never see messages sent to you; senders can still send them, with no error indication.

- Nothing is encrypted, which means administrators on any instance that processes a message can see them.

I strongly recommend using something else for private messages.

@mattblaze Happy to say I rather quickly figured out that those were not so much a "direct message" as a thread with some (!?) limitations on visibility & interaction - but yeah, this could definitely be clearer.