9. They Let Unregistered Guests Spend the Night in their Hotel Room
Yeah, this one probably happens all the time. Who wants to go through the hassle of registering a “friend” or spontaneous hook-up with the front desk personnel? A full 37 percent of people have admitted to sneaking people in, even if they know it’s against the rules.

10. They Change Diapers on the Tray Table
It’s not easy to find official stats on this offense, but flight attendants report that passengers often change their offsprings’ dirty diapers on the tray table or airplane seat, even thought there is a changing table in the lavatory. Furthermore, these soiled diapers are often wadded up and wedged into the seat pocket – you know, the one you reach in to place your book, tablet or snacks. You might want to bring sanitizing wipes on board to brush over these surfaces, as the crew rarely cleans them between flights.
