We All Share The Same Air

We just had the pleasure of being forced to listen to some guy who was pacing up and down our office corridor talking at the top of his lungs into his little mobile penis while we heckled him under our breath in our office, for lack of any other way to retaliate (since I don't think I can shout as loudly as he was talking). I'm thinking of getting a large sign made that says: "Shut the fuck up!", which I can hold up whenever appropriate (heh heh heh).

Actually, I can think of many uses for it.