At the end of the day, you could pass any number of people who have touched children or thought about it. Unless someone is convicted of it you'd never know about it. Even then you could be passing people that have been convicted.And that is a sad, sad, part of todays society.
As a member of the general public you wouldn't know. But any industry that would be around children should need a working with children check but it will only show up a conviction or an allegation. If it shows up nothing they can't really guess if someone is a pedophile.
But if they knew about it and did nothing they are failing in their duties.
A father can not hold, touch, cuddle, or otherwise touch his children in public without someone questioning his motives.
A male teacher, cub/scout leader, or youth worker can not have a personal chat with a child having personal problems without someone questioning his motives.
We have lost the ability for adult males to publically show any form of positive emotion towards children without perhaps being accused of ulterior motives.
Perhaps this is a good thing in the long run that people point the finger, but I would hate to see a finger being pointed at the wrong person.