(V) & Tuesday:  Breightbart might can be sued for liable here, but I don't know if there is any precedent for that in the blogisphere.  We don't really have total freedom of speech in the US.  You can be fired from your livelihood based on what you say, etc.  Free speech should be responsible speech, but who decides what is responsible speech? 

Personally, I think telling your listeners that liberals are cock roaches who must be killed is like screaming fire in a theater.  Yes, the person who decides to act in this manner is ultimately the guilty party but the radical radio personality encouraged it.  Its a difficult issue though.  Could turn into a slippery slope where the gov't could take over freedom of speech.

Artful Dodger:  It seems to be a right wing talk radio thing to refer to liberals as "cockroaches" who are subhuman  It quickly follows that cockroaches are to be exterminated.  Micheal Savage comes to mind as someone who outright advocates death.  He once told a Gay man that he should "die of Aids".

http://video.google.com/videoplay?docid=-1948673167839820753#

There is also Glenn Beck's now famous tirade about killing Michael Moore or hiring someone to do it for him.

You may can cite samples of this kind of talk by liberal pundits.  That's not responsible either.  You might also laugh this kind of propaganda off as "sarcasm", but many people do not.