Last week, the coroner repeated calls for urgent laws controlling cyber and digital bullying to be introduced but stipulated Micaela had not been the subject of bullying.
Mr Pinkerton told The Daily Post he wasn't so sure his daughter had been involved in setting up the page as she was extremely upset by the comments left.
She isn't here to defend herself, he said.
"I don't agree [with the Coroner's findings] but have to accept it ... We don't really know who did it because Micaela isn't here to tell us."
Mr Pinkerton, who misses his daughter, said he was gaining support through a local suicide grief support group, which he attended every two weeks.
His dream is to be there for youth in the future so they know there is someone to talk to.
"The support group really helps. It's better than sitting around grieving all the time.
"I hope to help other kids so their parents don't have to go through this. It's horrible dealing with the death of a child."
Meanwhile, Justice Minister Judith Collins said she would be outlining new measures to curb cyber bullying within the next two weeks.