On a mailing list of the MIT CSAIL, when some students started a thread asking for more votes on their Facebook page, Dr Richard Stallman responded as follows -
Please do not ask people to use Facebook!
Facebook is not your friend. See http://stallman.org/facebook.html.
When prompted on why he thinks not using Facebook is more important than supporting an initiative that helps international development projects, he went on to say ...
Facebook is an international parasitism project.
Dr Stallman is the president of the Free Software Foundation (FSF.org).