My DS has beautiful, striking, ginger hair, I've consistently been very positive about his hair colour as I know it is a potential target for name calling. At school the male teachers have nicknames for the children, 'smithy' for a child called Smith, that kind of thing; except tonight my DS tells me one teacher calls him 'ginger ninja'...my son doesn't mind, but I'm just not happy, am I over-reacting? Should I say something?