For example, fighting in hockey is an accepted part of the game for many players and in many leagues. The evidence of acceptance is that fighting is expected, players who fight are praised and rewarded, and the penalties imposed are insufficient to deter the player or harm the team. There are several theories on the causes of violence, both in sport and in the general population, that could be relevant to developing policy positions or ethical standards. This theory suggests that humans are inherently violent. In this theory, sport would offer a relatively safe and controlled way to discharge aggression.
Violence is caused by frustration as one's efforts to reach a goal are blocked.
In sport, this frustration could be caused by officials, opponents and so on. Violence, or fighting, might be officially condemned and penalized but unofficially praised by coaches, team-mates, fans, the media, etc. The official penalties may be insufficient to deter the behaviour. Building a new brand of sport that supports core positive values such as respect, fair play, discipline and integrity means finding practical answers to these issues and developing the commitment and means to change . To start, we need to determine for each sport what constitutes crossing the line between playing the game and unacceptable violent behaviour.