After months of restricted access to travel, Indians are again swarming through airports, packing a raft of behaviour that can make flight experience terrible. Even with shrinking legroom and arguments over who gets the middle armrest, that is still not an all-excuse boarding pass for flyers to leave their manners behind on terra firma. While flyers need a refresher on in-flight etiquette, airlines, too, are sensitising and training their pilots, cabin crew, on-ground executives to handle untoward incidents involving unruly passengers to ensure aircraft safety, the Directorate General of Civil Aviation (DGCA) told airlines on Monday.