Stupid idea, and not just because it is dangerous. Most likely, each segment will have totally different, and entirely random, winners. Unless someone specifically targets this competition, which I doubt, the race situation will dictate who wins each time. Who gets dropped on a climb, who has a mechanical and needs to chase back, who's trying to establish a breakaway etc.
It would be a bit embarassing for the organiser to have a lot of guys tied at the points given for one "stage win", which could well happen.