Eliminate toxic culture
Gamertag idea: Karma system. Players give each other +/- karma so you can filter MP games to exclude bad seeds. Encourages good karma. Of course, those with neg karma can't vote until they act nice and ppl vote them good again. Watch patterns for friends cheating. It wouldn't prevent those with neg karma from doing anything, it would just allow the rest to avoid them. Many people avoid matchmaking because of the toxic culture of anonymous hate speech, and implementing "real ID" would never be accepted (although I support removing anonymity to remove the negative culture), but giving the community the democracy to "judge" each other and intentionally avoiding those that they would in real life so they can have a positive experience would be beneficial.