Going on vacation sounds like a great idea—and why wouldn't it? A chance to break out of the mold of your daily life by going to wait in line at a crowded airport, to get on a crowded plane, to travel to a crowded place where you can wait in line at whatever overcrowded landmark, beach, theme park, or historic place you decided to spend thousands of dollars to visit. Each time, we're supposed to be reminded that the ability to make these crowded trips to crowded places somehow makes commuting i…