Needed or not?
If it discourages one rider from pushing another to the edge of the track at 180mph along a straight, or discourages a rider from deliberately using another as a berm in a corner and punting them into the gravel, then it could be deemed plausible.
But measures already exist to deal with that type of thing. If necessary the FIM can ban a rider for as many races as deemed fit, or throw them to the back of the grid for as many races as they see fit, if they ar perceived to have ridden recklessly or deliberately tried to shove another rier off track
So is there any need for a new rule?
With the way it reads, that the penalties won't be carried over into next season, imagine the last race and a title showdown. A couple of points seperate the two riders gunning for it, rider A being 2 ahead of rider B. Whoever finishes in front wins the title. Rider A deliberately (albeit subjectively...) takes rider B out of the race. He gets 10 penalty points which means a ban, effective next race. But wait, there isn't a next race, so there is no penalty and rider A wins the title.
The new rules will have no affect on that....
The current system has sufficient rules to deal with whatever happens on track, if the FIM have the balls to use them. This is more meddling for no gain