Activism that seeks projects and causes that require the least amount of effort.

..is a portmanteau formed out of the words slacker and activism. It is a pejorative term that describes taking painless "feel-good" measures in support of an issue or social cause that have little or no practical effect other than to make the person doing it feel satisfaction. A person that engages in such activity is called a slacktivist.

http://en.wikipedia.org/wiki/Slacktivism

*see also: "what's the point?"