I am afraid school boys are regularly mugged in south london, it is an unpleasant fact of life, maybe more so for boys. Mine have been mugged several times, or attempted mugging, threatened with a knife at 7.30 am at a bus stop in west norwood. A friends boy was mugged by a group of boys whilst trying to take sanctuary in a shop. It is going to happen and they need to know how to deal with it so that they are not frightened to travel by themselves. Not having a nice phone/i pod/ and limited cash helps. I think the muggers get a high from just trying it on and scaring the little mites. :(