This article makes a detailed arguement about whether those who participate in web libel should have their anonymity gauranteed and protected under privacy laws. I won’t comment on that, except to say that internet critics currently have anonymity–as we know all too well. This anonymity enables them to make some pretty nasty comments which, whether true or false, inevitably become problematic for those being criticized.
http://www.miamiherald.com/opinion/other-views/story/1255416.html