Tourists descending upon beautiful cities, destinations and parks have not only led to a new term, "overtourism," but residents erecting signs saying, "Tourist Go Home." And really, you can't blame locals for becoming increasingly annoyed.
While overcrowding is the main issue, people also seem to be exhibiting more inappropriate, insensitive, outright outrageous behaviors while traveling. Crowds blocking views at the Trevi Fountain are nothing when it comes to tourists who bathe in said fountain. (Yes, it actually happens!)
Take a look at some of the worst examples of poor behavior by travelers in this review that makes us wish everyone could attend etiquette classes before catching a flight.