The umpires know what the players are going through. He can intervene whenever required and prevent unsavory incidents by keeping the players in good humour, thus gaining their respect. Cricket appeals to the public because it simulates life. This makes the watcher identify himself with the players. If the player lets out some steam or lets the passion get the better of him, it should not be penalized if it is not said in any wrong manner.
Some needle is essential for a lively contest.
Trying to control their feelings would take away a great deal of appeal from the game. For God s sake, humans play this game, not robots. Players of great distinction will tell you that at the highest level, Cricket is played more in the minds than on the field. Strength of mind separates the big boys from the rest. To succeed at that level, one has to deal with everything that the opposition throws, including sledging .