While Walt Disney World may be the happiest place on earth, there are some guests that can (unfortunately) make careless choices in their actions, making our smiles turn upside down. These actions can be stressful and may even put a damper on your vacation, but sometimes, there are things you can do to change them. You may not agree with everything on this list, but here (in no particular order) are 10 lousy things people do at Disney and how to deal with it.