There was a Seattle cartoonist that went into hiding, changed her name, quit her job and hasn’t been heard from since ... because of the death threats against her -and- the Islamic hit squad that entered the country to kill her.
It does happen ...
Seattle cartoonist still in hiding four years after Islamic fatwa
http://www.nydailynews.com/news/national/cartoonist-hiding-islamic-death-threat-article-1.2073298
I think the Left likes the idea of having a veto on free speech -- as long as it's not THEIR free speech being suppressed.