hacktivism

Formed by combining "hack" with "activism," hacktivism is the act of
hacking into a Web site or computer system in order to communicate a
politically or socially motivated message. Unlike a malicious hacker,
who may disrupt a system for financial gain or out of a desire to
cause harm, the hacktivist performs the same kinds of disruptive
actions (such as a DoS attack) in order to draw attention to a cause.
For the hacktivist, it is an Internet-enabled way to practice civil
disobedience and protest.