There are other categories here just above for airport and hotel rudenesses.
What I want to know about just below are the general travel rudenesses you've experienced. For example, travel columnist Christopher Elliott writes in the Chicago Tribune of "5 ways travelers have lost their manners," summed up in this Consumerist post by Chris Morran:
*Travelers treat their destinations with a sense of "I'm on vacation so I can do what I want" entitlement; *They either smell bad or like a walking perfume/cologne sample; *They dress like a depressed George Costanza when they travel; *They're ill-prepared and ill-informed and "act as if they're still at home"; *They let their offspring run wild like the world is their playground.
What are your experiences with these or other forms of boors on the road?