Features, OpinionYou should always leave your window shade open on an airplanePosted on December 26, 2018 (CNN) — Air travel is a struggle under the best of circumstances. Legroom seems to shrink with every trip, and the argument about whether it’s rude to recline one’s seat rages on (though some airlines have limited the pitch of the seat, which to this anti-recliner seems a fair compromise).But there’s one issue that seems to be getting worse: The Great Window Shade Debate.