there have been plenty that did, and paid the price for it. now they keep their mouths shut about it. The creators of FloodNet and other DDOS tools got blitzed by people at the pentagon and other govt institutions in short order when they tried their attacks on them.
There is no computer system that is absolutely 100% secure. Anyone, with enough determination, can get into any system, if they have the time and the willpower.
2600
This is a truism of any security system, not just computers. Even Fort Knox itself is ultimately vulnerable to a determined attacker with loads of time. Reality precludes itself precludes total security.