What is hacktivism?

Hacktivism is a controversial term. Some argue it was coined to describe how electronic direct action might work toward social change by combining programming skills with critical thinking. Others use it as practically synonymous with malicious, destructive acts that undermine the security of the Internet as a technical, economic, and political platform.

Essentially, the controversy reflects two divergent philosophical strands within the hacktivist movement. One strand thinks that malicious cyber-attacks are an acceptable form of direct action. The other strand thinks that all protest should be peaceful and non-violent.

Source: http://en.wikipedia.org/wiki/Hactivism