Busy, do not disturb button.

Could a button that has sends a pre-recorded message be added? It would be for when you have notifications on, and you're in an intense video game match. Then your old friend Bernard calls to play Minecraft. You hang up, but you don't have enough time to reply. He calls you again. You hang up again. He messages you, over and over. You lose concentration and die to a noob. You get all mad at him, and he says "Sorry, man. You weren't responding". The button would have a 2 second cooldown in DMs, to prevent major spam. It would have a 10 second cooldown for servers (or the server could modify the timer). I personally think it would be very helpful.