They are mentally ill people who go out in public day in and day out. Parents say he was not violent or aggressive prior to this incident. So I fail to see why they wouldn't take him out in public. What is he supposed to do, sit home all day? Son was born and was developing just fine, attended school, university until his schizophrenia manifested itself when he was in his twenties. It got to be super hard on the parents. But they were taking care of him and took him places without incident prior to this.