I was left home at 8... I personally dont see a problem with it if the child in question is mature enough to handle the situation, is aware how to and how not to behave and has someone to call on should something go wrong (ie neighbours or a family friend or can contact the paretns easily) In my day (lol) we didnt even have mobile phones, so you really were on your own! lol but as I said I have no issue if the child is responsible enough to handle the sitch