Now, the Salon essay's main point seems to be to argue that "threat-induced censorship" is not "a uniquely Islamic practice". I totally agree with that, other groups also dabble in such threats (and sometimes carry them out, too, e.g. see http://en.wikipedia.org/wiki/Anti-abortion_violence). However, carrying-out a unified agenda of world-wide censorship through political influence (http://www.economist.com/world/international/displaystory.cf...) or down-right intimidation when that doesn't work, is quite unique to Islamic countries.
I know, because I'm a Muslim and I come from such a country.