I have to say that I think it is almost impossible for anyone of eleven to be on their own on the net and not find their way into something or other you would rather they didn't see. I would make sure they do not erase the history or the websites they visit and also be very cautious of chatrooms, there are loads of children chatting away on there to god knows who. Maybe some people might not think you should be 'spying' on your child but I think there is just too much porn and too much going on to leave them unsupervised, as several of my friends have found.