Barker had tortured frogs and guinea pigs as a child
A poster on animal cruelty showing the killer of Baby Peter has been banned by the Advertising Standards Authority.
The People for the Ethical Treatment of Animals (Peta) poster featured an image of Steven Barker and said animal abusers were also violent to people.
The poster appeared on a billboard in Haringey, north London, where 17-month-old Peter lived and died in 2007.
The watchdog ruled that Barker's picture was used in a "shocking way merely to attract attention".
The text below the image of Barker read: "Steven Barker: Animal Abuser, Baby Abuser, Rapist. People who are violent towards animals rarely stop there."
Residents in Haringey complained that the poster was "offensive and distressing".
Peta stated studies linking animal cruelty to further violent crimes to defend their use of the poster.
But the Advertising Standards Authority upheld the grievance.
It said: "We noted that, although Baby P died in August 2007, his death was a high-profile, emotive case which continued to get extensive press coverage.
Baby P's mother and her boyfriend were jailed over his killing
"We acknowledged that some people might therefore find the reference to the Baby P case in the poster exploitative.
"We considered that the claim and image used in the ad had been used in a shocking way merely to attract attention and that the reason did not justify the means in this case.
"We therefore also considered that the ad was likely to cause serious offence and distress to some people."
Following the ruling Peta spokesperson Poorva Joshipura said: "Cruelty to animals and children is inherently shocking, and in creating the ad we hoped to prevent other children and animals from suffering the kind of shocking abuse that Baby P and Mr Barker's animal victims suffered.
"It is imperative that any community faced with animal abuse take measures to stem the violence before more children and animals are attacked or killed."
Baby Peter's mother Tracey Connelly, 28, her boyfriend Barker, 33, and lodger Jason Owen, 37, of Bromley, were jailed after being found guilty of causing or allowing the child's death.
As a child, Barker had tortured guinea pigs and frogs.