4Game

https://www.dota2.com/newsentry/2995430596679058277

BANNING SMURFS

Even the most fairly-matched games of Dota can spiral out of control. And no one wants the extra burden of playing against smurfs. In the past, we leaned heavily on attempting to detect smurf accounts and move them to their correct MMR more quickly, which has helped somewhat but still causes damage along the way in cases of extreme smurfing.

Starting today, smurfing will be a bannable offense. We will primarily focus on new accounts created after today for which we have high confidence in their smurfing and game-ruining behavior. Moreover, we will also occasionally manually ban old pre-existing accounts that are clearly game-ruining. Furthermore, if you are found to be selling accounts, boosting or engaged in similar game ruining behaviors, your primary account may also be subject to a ban. To go along with this, we've recently increased our ban rate for boosters and purchased accounts.

For cases where we don’t have extremely high confidence, but do have cause for smurf suspicion, those accounts are more likely to play with other suspected smurfs until we gain confidence to judge one way or the other.

If you do suspect someone of smurfing in your game, use the new post-game report option included in this update to flag them. This will help us track legit offenders and gather data used to inform our anti-smurf efforts moving forward.