This comment suggests that if more than one person was involved in the attack, then the chance of a leak, and hence apprehension, increases substantially. Assuming the hackers are typical, the complexity of the Internet does them no good. Stability of place in both the real and virtual world confounds anonymity. Only if there is new legislation can there be complete privacy on the Internet, and such legislation does not appear to be on the horizon. Zeran's tormentor or the recent attacker of the e-commerce sites may escape, at least temporarily, but time and technology or their own vanity will trip up all but the most determined.
Criminal acts deserve to be prosecuted.
Those who hope to commit criminal acts behind the mask of an Internet protocol cannot expect the laws protecting freedom of expression or privacy to shield them from prosecution.