I'm not really surprised by the authorities reaction (exactly what FIFA would do) but i would have expected more from the media and general public.
"The league panel decided that not only would the yellow card – and thus his suspension – stand, but that Cagliari would not be penalised because the chanting was “only from around 10 people” and was only heard due to fellow fans staging a silent protest."
"Pescara, of course, condemned the events and backed their player, but on the peninsula the only real sound was that of heads being wilfully and ignorantly plunged into the sand. Cagliari’s vice president Stefano Filucchi insisted that “nobody here heard anything,” and the Gazzetta dello Sport’s match report accused Muntari of “losing his head” but largely ignored the incident."