Flak

http://commons.wikimedia.org/wiki/File:Traian_vuia_flying_machine.jpg

Letter to the Times, April 27, 1910:

Sir,

Motor-cars are bad enough, but they do not come into one’s house or garden. With aeroplanes total strangers may drop in, through the roof, for a little chat at any time. I fear the law cannot protect one against such intrusion. If aviation becomes popular I shall have spikes, with long strong prongs, fixed on the chimneys of my house, and the word ‘Danger’ painted in large red letters on a flat part of the roof. If any flying machines come down in my garden I shall send for the police to remove the occupants, whom I shall sue afterwards for any damage to my trees or shrubs.

I am, Sir, your obedient servant,

H.B. Devey