By , The Washington Post Do it for your fellow long-suffering air travelers. Do it for that seatmate who is feeling a little violated after the indignity of a TSA pat-down. Do it for all the good citizens who, just like you, wish that their knees were not practically tucked under their chins, whose seat backs don’t recline and whose tray tables are too small to hold a laptop. Do it for the thoughtful vacationer who resisted the urge to buy that comforting black-bean burrito and instead purchased a non-odoriferous mixed-green salad to sustain her on a three-hour flight though she knows full well that a few cups of mesclun will leave her more than a little hangry. Dress not for yourself but for the strangers whose personal space you will be forced to invade. The conversation about air travel attire once again rose to a roar after United Airlines recently denied boarding to two teenage girls wearing leggings.