My biggest peeve with the youngs of this household is that they don't respect the commons. Things -- glasses, towels, tools -- have a place and should be returned to that place for use in the future.
Glasses particularly. Oh, I (speaking for the house) own a set of water glasses if I can count those in cars, Natchez and Baton Rouge as a set. Kids don't even have to put them in the dishwasher. Just set them in the sink.