Liability issues are cited but that was always part of the thrill. My recess touch football experience ran the gamut from grass stains of epic length to having my braces partially removed by a football to the mouth. (My orthodontist - the next stop after the playground - simply removed them, saying it was about time for that particular collection of metal to come out anyway, to be replaced by an even more medieval contraption.)
Dodgeball, on the other hand, has nothing to recommend it, at least from the perspective of a scrawny kid who could throw neither with power nor accuracy.
Frequent commenter JWT notes that the story has been picked up by CNN and observes:
School districts on our side of the pond could not let the Norwegian sit-ivists stand alone in ridiculous over-regulation of kids. Chess may be outlawed, because the bishops wear those pointy hats.
Do not adjust your monitor - JJV has not taken control of my keyboard.