New Xbox One notification colour-codes players by reputation

PLAY NICE: In an effort to keep gaming a social activity, Microsoft is introducing a new Reputation System that helps players know who to challenge and who to avoid. — Reuters

In an effort to keep gaming a social activity, Microsoft is introducing a new Reputation System that helps players know who to challenge and who to avoid. 

Coding players from green (good players) through to red (avoid me), Microsoft has been talking up the changes to how it polices the Xbox Live community since last July.