Basically someone with a high matchmaking rating creates a brand new Steam account and installs the game, pretending to be a new player. They then proceed to stomp on the actual new players and just be generally as toxic as possible. After all, if that account gets banned, they can always make a new one.
Smurfing is Not Welcome in Dota (www.dota2.com) angielski
From the Dota 2 website:...