Did this teacher go too far by combing a student's hair?

Earlier this month a teacher posted the above photos on Facebook. In her post she explained that the little girl came to school with her hair seemingly undone.

Quoting the FB post: “So one of my students came to school today with her hair full of knots, lint, and ridiculously tangled. It looked like it hadn’t been touched the entire holiday break…so my classroom became a salon. The photo on the left is before, and the right after. It just broke my heart so badly that I refused to let her leave school today the same way she came. When I finished she looked at herself and said “aww so pretty” … the beauty is that she is normally non-verbal (autistic). So now I’m crying lol. My day has been made!”

IJS

What would you have done if a teacher "did" your child's hair at school and posted it on Facebook?

Did the teacher cross the line?

Was it any of the teacher's business?

If a student came to your class unkempt, what would you do?