Isn't playing in a party just a legitimate strategy? I understand that a coordinated team playing aggressively can be hard to counter, but in the end it's both not a punishable offence but also essentially a group of friends having fun or winning. This is naturally how the game is to be played; more coordinated teams will win, regardless of them being partied or not. Being in a party and playing together simply pits that coordination against solo-q players like you, which ends badly due to less coordination and group effort. As many other have mentioned here, the end goal of your thread does not make sense at all: punishing (not literally banning, but putting them at a disadvantage) people for playing with friends/playing seriously would hurt MP's reputation and the health of their player base. Why not reach out to good players you come across and agree to party with them?