Via the LiquidMatrix article, “Sabu Rats Out Lulzsec “, I got over to the article on FOX, “EXCLUSIVE: Infamous international hacking group LulzSec brought down by own leader”.
This succinctly illustrates one of the biggest tools that anyone has against criminals: the lack of trust amongst criminals, and their fear of justice system punishments. Clearly this requires there to be laws, and the pursuit of them, but ultimately a criminal always needs to be looking over their shoulder and being distrustful of their peers.
Even the increased level of anonymity the Internet provides is not always enough to keep social* criminals safe.
* Or those that can’t stand on their own. In other words, if you have stolen goods, you still need to sell it to someone/somewhere, or have contacts to do SpecializedTaskB or whathaveyou.