In much the same vein as the previous post.
Careers Information Office in Bomber County 198X We are blessed with a visit by some WW2 aircrew who are on a pilgrimage to their old stamping ground.
According to them, at the outset of the war they were tasked with dropping leaflets over Germany. (Nickel raids I think?) Printed on them in German were the words "This is a leaflet not a bomb" After a very short time they became bored with this and replaced leaflets with housebricks marked "This is not a leaflet"