Warchalkers or Wibos - Computer Definition
Computer enthusiasts who mark zones where there are active but unsecure Wireless access points. This name was given to them because of the marking of “hotspots”—an earlier practice employed by hobos during the Depression in the 1930s. Then, hobos would mark houses and establishments offering food or work for survival.
See Also: Wireless.
McFedries, P. Technically Speaking: Hacking Unplugged. IEEE Spectrum, February 2004, p. 80.