Stewart and Colbert Rallies

Here is a story about John Stewart's proposed "rally for sanity" and Colbert's planned "counter-demonstration" to "keep fear alive."  I'm not sure how I feel about mocking public rallies and demonstrations (although it's not entirely clear this is the intention).  But it is true that those who tend to protest in public often represent small, deeply engaged segments of the public.  I wonder, all joking aside, whether a large crowd of busy, less energized folks will turn out for a rally on the Mall.  For fans of Stewart and Colbert, anything seems possible . . .