The head of the Department of Sport and Recreation has issued a warning to parents ahead of the winter sport season, claiming some children were dropping out of sport because they were "embarrassed" by their parents' behaviour.
Director-general Ron Alexander said he was concerned some parents lost sight of why their children played sport.
Mr Alexander said if parents had issues with a sporting club, they should offer constructive criticism and even offer to help.
He said parents should encourage their child and ask positive questions rather than only quizzing them on whether they had a win at the end of a game.
"A whole range of children drop out of a sport because of the poor attitudes of the coach or even the poor attitudes of the parents, and children are often embarrassed by the parent's behaviour," Mr Alexander said. "The most important thing in a child's coaching session is that the child wants to come back next time."
Mr Alexander also described the coaching practice of not giving children equal time of play during a match as a "disgrace" and said parents of children left on the sidelines had reason to be upset.
"There are a lot of great people doing great things, but every now and again someone loses sight of why they're coaching or why they're president of a club," he said.
Mr Alexander's warning comes as the head of the Play by the Rules initiative, which works to prevent and deal with discrimination, harassment and child safety issues in junior sport, has reported an increase in the number of complaints received from parents.
National manager Paul Oliver said parents now expected a lot more from their child's club.
Mr Oliver said more issues arose as team selections started before the new season and during finals when coaches often chose to play the more skilled players.
WA Football Commission game development director Warren Nel said they received few complaints from parents over selection because children did not play for points until they were 13.Football West chief executive Peter Hugg said the "ugly parent syndrome" was decreasing as more parents understood the spirit of fair play.
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