An Australian man was refused permission to board several international and internal flights recently. His "crime"? Wearing a "George Bush: World's #1 Terrorist" T-shirt (he was of course allowed to board after he had changed to a T-shirt less critical of the hegemon). It's a perfect example of how the "war on terror" has eroded freedom of speech, and how rights we take for granted - for example, the right to criticise our political leaders and their policies - are being abrogated in the name of "security" by the fearful and the cowed, even without formal censorship from the government.
(If anyone is wondering, the airlines in question were Qantas and Virgin Blue).