Perpetual message notifications

LMFAO—

I played the "respond as dryly as possible to a user who is likely not a real person" game, and they either blocked me after sending a message, or deleted their account. Now I perpetually have unread message notifications that I can't get rid of LMAO. 

Oopsie doopsie ╮(ᵕ—ᴗ—)╭

Any chance we could get a "mark all as read" button so that things like that can get cleared out when we no longer have access to messages with someone? 

Lol, Imma guess that was Yuki-something-or-other. They friended me too, saw you as a mutual, and they sent a one word PM "hi". I responded "nope". And unfriended 😅