Ms Kiernan also suggested that there was an "imbalance of power" within local authorities, with some adoption officers favouring certain adoptees over others.
Some wonder if going public with the faces and personal histories will open prospective parents to fraud and prospective adoptees to ridicule or worse.
But 8.6% of those who had at least one biological parent who abused drugs had their own abuse problems versus 4.2% of adoptees whose biological parents did not have a history of drug abuse.