I have a couple kids who do this daily. I had to find my backbone quick with this because the parents will just let it escalate...
The ones I know will do it I remind them of what I want them to do about 30 minutes before the parents get there (when mommy gets here, I want you to get your coat on and leave quickly and nicely). If they still try it and the parent does nothing, I "help" - put their coat on, take toys away, guide them out the door. I even took one little stinker out to his car after too many "no!!"'s.
So nope, not to much at all. Nobody wants to deal with that last thing after a long day. Go home with yo MAMA!!
