Ask the guy who is pretty good at SF Story Identification

[Darren_Garrison]

@Asuka

Humanity has been sending out radio waves for a century now trying to contact extraterrestrial life. Now they suddenly get a single clear and unmistakeable message from an alien planet near our solar system that simply reads Quiet, don’t let them hear you.

I’ve definitely read what I thought was a published short story on that (I used a version of it here.) There is some chance that it could be this, though. (It isn’t exactly a unique idea.)