Facebook and Twitter: These are absolutely the poorest ways to publicize a PUBLIC movement BECAUSE they are not really public. Facebook requires registration to see almost anything AND because of the nature of their search facilities, only your friends will see your material (and that is still somewhat unlikely, given the poor organization of the content). Regular ways of searching for content will not find this content.
Twitter is equally largely friends-only, not because it is not public (technically) but because of the large volume of passing material only friends would typically see what you have presented (which is greatly limited by being only 140 characters).
Some details : These modern "social media" are NOT indexed by Google, esp. Facebook. People looking for content IN THE NORMAL WAYS THEY DO (i.e. using a search engine) WILL NOT FIND the material. AND, even if you refer people to Facebook content, many do not want to register and create an account to SEE your writings, etc. This site is MUCH in contrast to Facebook!
From the standpoint of public-ness, find-ability, openness, THESE MEDIA ARE SIMPLY unacceptable. Use of these "social media" (often exclusively by some Occupy groups) is especially startling given the open, COMPLETELY PUBLIC NATURE OF NORMAL WEB SITES.
IN CONTRAST to the popular CORPORATE social media (Facebook, Twitter, etc) : Web sites, LIKE THIS ONE, are 100% open and public for viewing. AND, sites can be set up (LIKE THIS ONE) to be well-indexed by search engines. People can and DO find the content and can view it freely without registration. A good site, like this one, also provides public anonymous participation at some significant level. The fact that many Occupy movements cannot seem to have normal web sites for ALL their public business, speaks poorly for these movements -- if you cannot even marshal your own, how well are you going to be able to do otherwise?
In protest against the CORPORATE "social media", Facebook and Twitter, I have largely suspended ACTIVITY THERE. These media limit, contain, distract and pacify the Occupy movements and are essentially the "opiates of the masses". It is just plain dumb, stupid, ignorant, and unnecessary to use such poorly-organized, non-open media for important public concerns. Friends: Facebook is on-wall-street; are YOU occupying wall street OR are they occupying YOU??