The importance of teaching philosophy in schools cannot be underestimated. In a world where most of humanity is running on the treadmill with the blinders on, it is paramount that we re-evaluate our own perspectives from time to time, and look at the big picture.
People thinking too much for themselves might indeed be disruptive to society as a whole?
Personally I think teaching children to be able to think for themselves sounds like a very important element of what education ought to be about. And I do get concerned that people have this propensity to simply repeat things as if it is blindingly obvious and anyone who questions something is a fool.