Pete Andrews jun (35) was smoking up to two packs of synthetic cannabis a day after moving from its natural - and illegal - counterpart several years ago.
He had weaned himself off the product over the past two months but now feared for the safety of others who were opting to go cold turkey, or still being harmed by the product.
Mr Andrews said he decide to protect his community by starting the Facebook page ''Stop the Sale of K2 in Mosgiel'', which nearly 1500 people had ''liked''.
''I have been out here [in Mosgiel] for 30 years and I have seen how cannabis and alcohol had affected our community, but it was nowhere as bad as this.
''And it is getting worse every single day,'' he said.
Last Friday, he walked up Gordon Rd picketing outside the stores that sold synthetic cannabis products, and ''I got a lot of hostilities from one certain shop''.
''I actually thought I was going to get a beat down from these people.''
Mr Andrews said almost everyone knew someone who had been affected by the products and he would continue his campaign, including picketing more shops tomorrow.
On his Facebook page, he was also naming and shaming stores which continued to sell synthetic cannabis, while encouraging the community to support those that did not. For him, the major concern was children as young as 10 were ''getting hold of it, and it is very dangerous for people that age''.
South Dunedin Labour MP Clare Curran also visited Mosgiel dairies this week asking owners to not stock the product.
