A timely paper by an occasional collaborator of mine, the very excellent Ted Lewis.
Attempts to control the flow of information through a social network by censorship or blocking are unlikely to succeed for a number of reasons: determining what is true and what is fake may be difficult; identification and response to outbreaks of viral information may be economically impossible in a timely manner due to the size of the network and speed of spreading; and censuring may be considered bad for business.
manwithoutqualities 