the practice has been coined by Matt Jones, entails simply drawing a chalk symbol on a wall or pavement to indicate the presence of a wireless networking node
(,
Tue 8 Oct 2002, 2:14,
archived)
poo chalking is funnier :)
www.peanutbuttermarshmallow.fsnet.co.uk/pb/poochalking/
(,
Tue 8 Oct 2002, 8:18,
archived)
www.peanutbuttermarshmallow.fsnet.co.uk/pb/poochalking/