I know people who are even more disgusting when they are away because "there's a maid to clean up." I had to get on our niece and nephew when we took them to WDW for exactly the same attitude.
I see housekeeping/mousekeeping as "people" who are there to do general cleaning and housekeeping (make the bed and change the towels, etc.), not clean up our personal mess. Nobody should ever be on vacation from good manners and personal hygine.