The dangers of skiing are not so much about what injuries you may inflict upon yourself, but what injuries someone else may inflict upon you! Poor C can vouch for that.
Novice skiers and young children careering uncontrollably present a hazard for sure. But the most worrying and dangerous in my view are the snow-boarders. You can hear them coming behind you, but as you need to be looking forward to avoid collisions yourself you just have to hope for the best. Unless experienced and skilled, boarders just seem to be lethal. The fact they can't stop without sitting on their backsides and head down the mountain with two feet strapped to a single board says a lot to me.
Everyone has a right to take to the slope. Perhaps it is my old age. But I cant help feeling that Boarders should have their own slopes. At least until they are able to turn or stop with a degree of control rather than hoping everyone will get out their way and if they don't using the skiers to stop them!