Black Hats who break into others’ computer systems without authorization, dig into code to break a software’s copy-protection provisions, flood Internet sites, deliberately deface Websites, and steal money or identities. Sometimes the terms “network hackers” or “net-runners” are used to describe them. Often the media incorrectly substitute the word hacker for cracker—a behavior that irritates many in the Computer Underground.
Schell, B.H. and Martin, C. Contemporary World Issues Series: Cybercrime: A Reference Handbook. Santa Barbara, CA: ABC-CLIO, 2004.