Okay let me try to help you with this case.
DoN is only, and I mean only, fair in a points based league (i.e. like CL2K was).
In a rating-based league it's unfair for one of the players in 99% of all cases because of the difference in rating. When a 1-1 is reported it's almost always gonna be an overall + in rating for one of the 2 players.
Higher ranked players use DoN as a way to avoid losing points (hi GodiTo) because lower ranked players would gain points even if they play 1-1.
You see, DoN is absolutely indiscutable here and thus should be explicitly not supported by the league.
Cheerio.