suggestions on creating a personal matchmaking blacklist system

A player can move any other player to his personal matchmaking blacklist at his own will for no reason at any time. Players on your matchmaking blacklist will never become your teammate or at least for a long period of time say three months. You can remove any player from your blacklist at any time. Moving too many players to your blacklist will result in slow matchmaking due to you have filtered so many players so you must choose very wisely which one to block. The upside is pretty obvious, you will never be bothered by “infamy droppers” or “weak players” on your own opinion. And all players should behave themselves as once so many people blacklisted them it will be extremely hard for them to make a match. Though the players on your personal blacklist cannot be your teammates they can be your opponents.