They shut the idea down and wouldn't do it because Mr. Youth Softball Coach has rights under Canada's Privacy Act. I walked out of the police station completely stunned when I heard that. He has a right to privacy. I still have trouble comprehending that.
It is quite common to be baffled about this, but think of it at an angle:
If criminals are forever marked as such, how are we ever going to get rid of crime? If society tells the convicted person that it's never going to forget, there is zero incentive to improve. Some criminals make honest mistakes putting them on the wrong side of the law and if they're then stamped as such, the threshold to keep doing things the easy way just all but disappeared. This is the general problem with using increasing oppression and things like three strikes out policy; there are no incentives for people on the line to stay clean.
If we, OTOH, treat them as people, they have a reasons to behave like people, but:
I'm often reminded about a quote from one of the most experienced computer-crime police officers over here; "Luckily for society, the average criminal is pretty stupid". One can't always expect law-breakers to act rationally; if they did they would stay out of trouble. The incentives must be tailored to this.
Naturally this comes to an extreme in the case of the child abuser; since they commit horrible crimes, and additionally very often are repeat offenders, there might seem to be argument for a "throw away the key" policy. Also, no-one wants to be found endorsing them. This means that they in addition to being people we need to keep an eye on, they are the perfect tool for people who want to take our rights away. "Think of the children!" et c. is a trigger phrase for me, as a result.
In the end, it might be a reasonable compromise that the police have an eye on the offender and we can be content with that. Even if it seems illogical at first.
Over here, you, if you're working with children, must ask the police for a selected register printout and show it to your employer at regular intervals. I'm not very impressed by it, but it's at least better than lynch mobs.