Question from washingtonpost staff writer: Last weekend, an American Airlines flight crew prevented two passengers from boarding a flight because a crew member considered a T-shirt worn by one of them obscene. BizClass wants to know, do you believe that a traveler's attire, or personal hygiene issues, should be factors in whether the passenger is permitted on a flight? Please send your comments, along with your name and a daytime number, to alexanderk@xxxxxxxxxxxxx