Should you be concerned?

Received an interesting email today:

"My neighbour's 11-year-old wears make-up (mascara, blusher and lip colour) every day when she's not at school, including just around the neighbourhood. I think she's too young, and I think it's quite dangerous to make such a young girl look older. I have 2 questions:

Am I right or old-fashioned? and Should I say something? I think her mother already knows, as it is all the time."

What do you think...?