There is already a question on this below.
http://www.theanswerbank.co.uk/News/Question1225395.html
It seems to be a personal opinion rather than one backed up by scripture (I hope). It is clearly criminal because laws are broken. So the question is, should it be against the law? Clearly it should, children need protection from bad people.
The Catholic church has long had a problem with peadafile priests and has caused the organisation great harm. Perhaps this priest has something to hide? Or perhaps he does not want to admit that his church is full of bad people and prefers to think it is full of ill people instead.