There is no reason for top 50 players to be playing on multiple accounts at the same time. This alone would solve 100% of the match-ups against oneself.

To take it a step further, if this becomes acceptable, you will end up having teams of players at the top, losing intentionally to boost a teammates accounts.

I get the decentralized part, but from a gamer's perspective, maintaining a fair atmosphere is essential to this games future in becoming the best game of all-time!