The glider is slowly being adopted an the un-official emblem of the hacker / cracker community.  Shown here in lime green on black, the design is also available in other colour combos, including silver and glow in the dark.
For more about the glider see http://catb.org/hacker-emblem

Whether your in your car wardriving for open networks, or prefer to do your network snooping on foot the same dillemma faces us all: What to wear.

Luckily Shirthead have come to the rescue with a line of T-shirts and accessories designed with Wardrivers and war-walkers in mind. We’ve even included snazzy silver print and glow in the dark logos. There is no excuse for looking shabby when wardriving anymore.