When asked what age is too young for sexual activity he replied "if a child is old enough to talk it's old enough to have sex".
However, after losing a court appeal, he will now only be granted permission to travel abroad if he has written permission from a police chief constable.
Leonard was jailed for 32 months in 2013 after downloading 251 indecent images of children and then sharing them on the internet.
He was given a sexual offences prevention order (SOPO) to monitor his internet use, however Lancashire Police said it was now no longer "sufficient to manage his risk".
Today, they were granted a sexual harm prevention order (SHPO) by magistrates in April this year.
The SHPO includes additional measures preventing benefit claimant Leonard from having any unsupervised contact with a child under 16.
Leonard claimed the new order was "completely disproportionate" and made an appeal to Burnley Crown Court to have the SHPO revoked.
Detective Constable Andrew Ashworth told the hearing that Leonard is "one of the most dangerous offenders I have met" and that he posed an "exceptional risk".
He said: 'Mr Leonard is unique. In the 10 years performing this role I have never met a sexual offender who quite openly acknowledges his paedophilic tendencies.
"He is exceptional and has been risked as exceptional. He is very vocal and adamant about this persecution. He likens it to the persecution of homosexuals 40 years ago.
"Mr Leonard has expressed his desire to leave the country because he believes the police, judiciary and government in this country are persecuting paedophiles.
"He believes that in the fullness of time paedophilia will be accepted in the same way that homosexuality is today.
"He has talked about the Netherlands, France, Spain and Italy because he believes they have a lower age of consent in the mid to low teens."
The appeal hearing was told that Leonard watches "very child orientated" adult pornography with "models dressed to look like cheerleaders or in school uniforms".
Ashworth added: "[Leonard] has accepted that his mother, who he has a close connection with, is a factor in holding him back as to his sexual lifestyle.
"He has indicated that when she dies, and she is an elderly woman in her 80s, he will go abroad to seek children.
"For me the only pro-social influence in his life at the moment is his mother and that's purely because she is alive."
Stuart Kaufman, representing Leonard, described his client as the "Ronseal of paedophiles" and said the new SHPO restrictions were "completely disproportionate".
He told the court: "r Leonard said he would always abide by the laws of whichever country he goes to.
"If the age of consent is say 15 in Thailand then he would abide by that law. He is the Ronseal of paedophiles. He does exactly as he says on the tin.
"There's nothing on Mr Leonard's record to suggest he has [had sexual activity] with a child. The only thing he has ever done is downloaded child pornography.
"There has been no changes in Mr Leonard's conduct since the SOPO was made in 2013. The court could have made a SHPO then but they didn't.
"If his mother dies it may change but at the moment it is completely disproportionate."
Judge Sara Dodd dismissed Leonard's appeal and said he was "deeply disturbed" with a "frankly alarming attitude to paedophilia".
