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.

This is it. The official shirthead shirt.

He’s a head. He exists predominantly as a two-dimensional, glow-in-the-dark object. A noble life I think you’ll agree, but he seems a little upset doesn’t he? You know why? Because you don’t buy enough of his products. That makes him a sad shirthead.

So why not give a shirthead a home today and you’ll realise that’s no expression of sadness on his face, but a smirk of feint superiority at the frankly pedestrian t-shirts that others around him are wearing.

Give it a day or so and you’ll feel the same way…

This is not just a glow in the dark t-shirt. This is not just a glow in the dark power button, but this t-shirt, in itself, symbolizes hope for man-kind. By seeing this t-shirt worn by someone will make the hair on the back of your neck stand up, when you realise everything that the human race as accomplished so far, everything that we capable of and how far we have come from just humble cave men.

So, by wearing this t-shirt, you will become totally perfect, and totally pure. Possibly even the perfect being of the entire human race. To whomever dares wear this humble t-shirt, we which you good luck and God be with you.