it hasn't happened to me, I am a dark brunette but 2 of my kids are ginger and DS has had plenty of grief because of it over the years, he has now almost completely grown 'out' of it and his hair is pretty much a mousey colour and he is thrilled. It makes me to think he is so very pleased to lose his red hair.
DD is nearly 5 and is ginger, I don't think she will grow out of it as hers is a different tone to DS2's. The thought of someone, anyone making your children feel less of a person because of their hair colour makes my blood boil