Option to exit lobbys incase of troll

Like lets say if 4 people do /leave everyone leaves lobby incase theres a troller in the team and if they have a duo then that duo cant vote to leave and its 3 votes to leave game (this is only in solo queue) and if 4 people vote yes they leave lobby i just had this game with a raka who was gonna go mid no matter what even though she got support and said im not supporting noob and then went mid