[MontyCarloHall]

Hilarious, but you can just option click the notification center icon to silence all notifications. No need for a standalone app.

[omni]

The point of the app is it does this for you automatically when it detects screen sharing, negating the chance that you forget to turn it off yourself.

[mihaaly]

my favorite solution is still disabling the damn notification center altogether for good. nothing to be forget about then.