Good. A person who is sexually attracted to children should be classed as a potential sex offender and kept track of, and prevented from contact with children.
It is very well documented that these things progress in many cases, pictures, then more pictures, then worse pictures, then, in many cases, actual physical contact with a child or children.
OK, there are many who 'only' ever look at pictures, but tbh, I'd rather err on the side of caution in these cases. I don't think it is acceptable to wait until someone who has demonstrated a sexual interest in children has actually abused a child before flagging them up as a danger and preventing them from hurting more children. Far better to take such preventative action as is possible and hopefully prevent that first child from being hurt.