WarDriving is the art of discovering and documenting the locations of
wireless access points while driving. Warwalking is the same thing,
except that instead of walking, the warwalker uses smaller handheld
equipment while walking. A related activity is warchalking, which
involves visibly marking (often with chalk on a sidewalk or wall) the
location and status of wireless access points. With the rapid growth
of wireless networking devices, warchalking has been replaced to a
certain extent by online databases complete with maps.