Computer hacking really results in financial losses and hassles. The objectives of terrorist groups are more serious. That is not to say that cyber groups can't access a telephone switch in Manhattan on a day like 9/11, shut it down, and therefore cause more casualties.
Kevin MitnickAre hackers a threat? The degree of threat presented by any conduct, whether legal or illegal, depends on the actions and intent of the individual and the harm they cause.
Kevin Mitnick