Inappropriate words are not to be used in the daycare and I would stress that to the parents right away. Just as karate kicks and guns are not appropriate in the daycare. What's the difference? Deal with it quickly so it isn't a big deal but if the child is allowed to do or say these things at home how are they supposed to know to turn it off when they walk into the daycare door. It's teamwork between the parents/caregiver to raise a child.