Many, many supposed "libertarians" (particularly in the US, to a lesser extent here) seem to have traded in their spines the day after 9/11, and are now all in favour of authoritarianism, so long as Dear Leader protects them from the terrorists. Probably the most prominent example in the blogosphere is Glenn (instapundit) Reynolds, who hasn't seen an example of government control he hasn't liked.

There's still sane libertarians out there, though. And by and large, they are pissed.