Banned because the residents of Arizona are being bombarded with huge dust storms. Some meteorologists have called them "Haboob" after a very similar phenomenon common in the Middle East. Some citizens are really ticked off by what they see as an "unamerican" word:
“How do they think our soldiers feel coming back to Arizona and hearing some Middle Eastern term?”
“Who gave you the right to use the word ‘haboob’ in describing our recent dust storm? While you may think there are similarities, don’t forget that in these parts our dust is mixed with the whoop of the Indian’s dance, the progression of the cattle herd and warning of the rattlesnake as it lifts its head to strike."
Ok. So, yeah, "Ha-boob" is probably not the best thing to say on English-language network television. But seriously? Have these people nothing else to do with their time?
EDIT: I forgot. Did not make this up. http://www.nytimes.com/2011/07/22/us/22haboob.html?_r=1&scp=1&sq=Haboob&st=cse