LW#1 -- Sorry Amy, but the least effective way to get a bratty kid to obey you is to use the term "You know we don’t".  Bratty kids could care less what "we" do.  Look the little brats in the eye, bend down, smile malicously and quietly tell them to get lost.  Brats don't respond to "nice".  I used to work in retail and have run off destructive little store destroyers quite effectively that way.  They aren't quite sure just what I was going to do next.  LOL.