In this paper they make a pretty compelling case as to why limiting/censoring media would actually be counter-productive and make the riots worse. http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1909467

I have yet to find any research that shows that censoring would have the desired effect, which to me shows how dangerous politicians can be. Proposing such extreme measures based on gut feelings rather than sound research could seriously blow up in their face.