I think it's kinda obvious why it should be bannable. You are ruining the game for others. I understand if you want to play with lowrank friends, but at the end of the day, all you are doing is boosting them to a rank they shouldn't be at,...

i always do so bad when i play with my friend i just keep on dying and dying every round struggling to get a single kill right now im bronze 1 and my friend is plat 1 i always bottom frag every game.

TenZ talks about bronze players