Editor’s note: Sign up for Unlocking the World, CNN Travel’s weekly newsletter . Get news about destinations, plus the latest in aviation, food and drink, and where to stay. CNN  —  Was the raw dogging travel trend not spicy enough for you? How about something more heart-pounding, more dangerous — and definitely not recommended by airlines? We’re talking about “airport theory,” a TikTok trend that invites people to arrive at the airport as little as 15 minutes before their flight boards. The