Smurfs ruining entire tournaments

So i got 4 friends together to play the new tournament with when we saw the enemy had 1 afk. But when we looked them up in op.gg we saw they were obvious smurfs. One person was just warding all game and staying lvl 1. And the other 4 were probobly high diamond players, smurfing with low mmr accounts and completely stomping the entire tournament.

I really love the idea of tournaments, and it brings people together. But if these kinds of things keep happening and 5 people just ruining the tournament for the other 35 players its just stupid. I hope something will be done to prevent this.