Why doesnt riot ban smurf?

I just ran into a pro player who is challenger tier and got 2 games in low plat that were ruined. The guy was streaming on twitch and after the game sending everyone link. Why is this allowed. These game were not fun for any of my teammates when we are outmatched and out-skilled so bad. I get that its hard to catch smurfs etc but riot really needs to put there foot down and say SMURFING in RANK isn't allowed. Honestly, just making that statement and allowing us to send it tickets when dumb players who smurf provide proof would easily stop this.
Reportar como:
Ofensivo Spam Mau comportamento Fórum incorreto