1. Those who exploit vulnerabilities in networks, such as the Internet or phone system for their own gain or for general chaos. Also referred to as "Black Hat" Hackers as well as a variety of other names including "Phreakers" for phone hackers. This is considered unethical by many.
Usually referred to in the mainstream press as a "malignant user" or "malignant hacker" - considered incorrect by the Hacker community.
The illegality of an action depends on a number of factors including:
- Method used during exploitation
- Type of system targetted
- Jurisdiction from which activity took place
- Scale of damage or of distribution
Famous Crackers, cases