David Archuleta will be on his own as he prepares for this week’s American Idol competition now that his father has been banned from the Fox (NWS) show’s rehearsals and backstage area.

Jeff Archuleta has been rumored to be an overbearing stage-dad for some time, and now the American Idol producers have had enough: An unnamed source told the AP that the senior Archuleta's micromanaging his son's song arrangements crossed the line.

The father reportedly told David, 17, to change some of the lyrics to Ben E. King's "Stand by Me," to include a verse from Sean Kingston's "Beautiful Girls." Producers had asked that the change not be made because it would result in having to pay royalties on both songs. David, perhaps at his father's insistence, performed the additional verse anyway.

Jeff Archuleta is not the first to take parental guidance too far. At first it was stage moms who were routinely criticized for pushing their young daughters into beauty pageants and talent contests. Now, there are no limits: Both moms and dads have become a presence, and sometimes an overbearing one, in their children’s extra curricular life. What parents may not consider is that their extreme actions can cost them and those around them, big time.

Take tennis prodigy Mary Peirce’s father, he was suspended by the Florida Tennis Association for six months after screaming, “Mary, kill the bitch!” during his then 12-year old daughter’s match. His out of control behavior cost his daughter funding from the United States Tennis Association in 1990.

Last month, in Colts Neck, N.J., Mario Romano, 42, pled guilty to simple assault for punching his son’s Pop Warner coach after they had a dispute regarding Romano’s son's playing time. And, in a more extreme example, in 2002 Thomas Junta was sentenced to up to ten years in a Massachusetts state prison after beating his son’s hockey coach, Michael Costin, to death following an argument over a game.

Of course not all over-involved parents become violent but many act inappropriately. “Many parents act crazy because they have lost sight of why they are there," says Eric Eisendrath, a lead trainer at the Mountain View, Calif.-based Positive Coaching Alliance, which conducts workshops for parents, coaches and children. "They try to live vicariously through their kids.”

Eisendrath's Positive Coaching Alliance aims to teach coaches to be double-goal coaches. This means their first goal is winning and their second goal is teaching life lessons through sports. They then teach parents that they should be second-goal parents who focus on helping their child learn those same life lessons.

Parents may not realize that their sideline or backstage antics may be causing more harm than good. According to Peter Roby, former director of the Center for the Study of Sport in Society, there are 40 million kids that play youth sports in America and 70% quit by the time they’re 13 generally. A top reason for quitting? The sport is no longer fun. To which Eisendrath says, “Many parents fail to recognize that youth sports are not professional sports and the kids should get the chance to just have fun.”

The same is true in the amateur show business world. Marki Costello, owner and president of Creative Management Entertainment Group in Hollywood, says that parents are one of the many things that she takes into consideration when auditioning children for acting parts. “I look for kids who don’t have overbearing parents," says Costello. "They can be very difficult to work with and sometimes it isn’t worth it.”

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