Talk about lowering the bar.  After all, this could never be taken out of context, right?  I can see it now... Glenn Beck said that "Even David Frum thinks"

If Barack Obama really were a fascist, really were a Nazi, really did plan death panels to kill the old and infirm, really did contemplate overthrowing the American constitutional republic--if he were those things, somebody should shoot him.

Uh, is it all of them at once? Because, you know, a lot of people thought your old boss and Cheney were hell-bent on number three, and I still don't think that is an appropriate response.  (Impeachment, criminal prosecution, and incarceration were completely satisfactory.).  More distressingly, a lot of people believe this to be the case for the current president. 
Heckuva job, David.