By the way, they are not playing rugby. It’s Soccer or Football. But the tackle you see is a rugby tackle. It is sad that players resort to such tactics to stop a superior team/player. But Lionel Messi cannot be stopped by even rugby tackles. He goes on to set up the goal which his fellow team mate scored.
Such unscrupulous practices exists even in the professional world. People try underhand tactics to get ahead of their peers and competitors. But in the process, they set a bad name for themselves. Those who consistently take the path of high moral ground will eventually win. Why? Because the truth will eventually speak for itself and the consistency of these good people will stand them apart.