Managing unruly kids who lash out at classmates and teachers is one of the most delicate tasks for schools, and those who must manage emergencies when physical safety is at stake understandably resist being second-guessed.But there's evidence that students are at times pinned, tied up or locked away in closet-sized isolation rooms for just being annoying even if they do not present a danger to others.Federal statistics indicate that disabled students and racial minorities are disproportionately likely to be placed under physical restraint, raising questions about whether the safety measures are administered even-handedly.Finding out what techniques your school district uses to respond to assaultive kids -- and how often -- should be a matter of a single public records request.