Magistrate David Day warned a man who admitted to supplying his friends with cannabis that not only was it illegal but he could be contributing to the profits of "organised crime".
"If he only know people who grew cannabis in a large scale... he'd probably shock himself," Mr Day said.
Harry Jones, 19, of Lisbon Circuit, was found in possession of 159 grams of cannabis and, three grams of MDMA and a knife on March 7, and text messages on his mobile showed people asking to buy cannabis from him.
According to police, officers stopped the vehicle Jones was driving on Icely Road after seeing him stop at a house that was known for drug activity.
If he only know people who grew cannabis in a large scale... he'd probably shock himself.Magistrate David Day
Police searched his ute and found a bag of cannabis in the footwell and powdered MDMA was in resealable bags in the centre console along with five small cannabis buds wrapped separately in foil.
They also found a 12cm sheathed knife and 100 grams of cannabis in a backpack and another 41 grams of cannabis in a bag behind the passenger seat.
Jones has used cannabis since he was 12 and consumed about two grams a day when he was caught but has been abstinent for several months and has applied for an automotive electricians course.
Jones was given a six-month community correction order for possession of the cannabis.
For drug supply, he got an 18-month community correction order, 60 hours of community service and a condition he abstain from drugs.
He got a six-month community correction order for possession of the MDMA and was convicted without further penalty for possession of the knife.
Jones was also caught driving with cannabis and MDMA in his system on March 22 and was given a three- month driving disqualification and $110 fine.
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