Imagine Floyd Mayweather (world champion boxer) putting on a mask so nobody could tell it was Floyd Mayweather. He enters the Toughman contest (amateurs only, no professionals) under an assumed name. Obviously, because he's Floyd Mayweather, he annihilates everyone and wins.
That's what smurfing is like.
Imagine Adrian Peterson (top-tier American football player) dressing up in some random high school's football uniform and going out to replace the high school's starting running back. Nobody can tell who he is because he has a helmet on. Every play, the high school QB hands the ball off to Peterson, who overruns everyone on the enemy defense and scores a touchdown. Every play for Peterson's team results in a touchdown because nobody in high school can tackle a pro running back.
That's what smurfing is like.
Imagine Jon Favreau (the guy who writes President Obama's speeches) disguises himself as a student and joins a high school debate team. He's going to be miles above and beyond any other students because that's what he does for a living at the highest level. His team wins because they have a professional.
That's what smurfing is like.
Imagine Lionel Messi (considered the best soccer player in the world) putting on a uniform of a youth soccer team and going out on the pitch. After the first couple of goals Messi scores, the players are going to realize he's practically a god and pass to him every time, and every time they pass to him, he's going to weave through the pathetic defense of youth players and score.
That's what smurfing is like.
And that's why I hate smurfing. If anyone smurfed in regular sports, they would be shamed and disgraced. Nobody would have any respect for them as players or as human beings. They would receive death threats for beating up on children. Why is it not the same in League of Legends?