"Personally, I think he's extremely lucky and if it had fallen under anti-doping laws, the penalty could have been double and that would have cost him a spot at the worlds," Trickett told the Daily Telegraph.
"He's got to face up to the responsibilities that come with being a role model and this is simply unacceptable behaviour from someone with his stature and profile in sport.
"Hopefully, he can learn from the mistake and it's a pretty big fall from grace after what he achieved in Beijing" at the 2008 Olympics, where the American won an unprecedented eight gold medals.
"It takes some of the shine off his spectacular performances in Beijing and this behaviour simply isn't okay."
If I could I would like to ask Libby these questions: Can a Playboy Bunny be a role model to age-group swimmers, and which is a bigger moral transgression, posing naked for a soft-porn magazine with great articles in it; (read that as Playboy), or harming yourself with illegal drugs?
Note, Amanda Beard publicized the event whereas Phelps certainly did not want it publicized.