I think that part of the purpose of the trials is to decide exactly what information to release.
I'm with you on this - the information should not be in the public domain - for one thing I would prefer registered sex offenders to keep in touch with the authorities and comply with their parole conditions etc, rather than go into hiding for fear of being lynched.
For another, as you say, what will parents do with the information. I have a 9 and a 10 year old - I want to equip them with the skills they need to be independent, and this will include a general awareness of the stranger danger - making it specific to a person, street or area is doing them no favours. In any case, what about he unconvicted sex offenders living next door, or in ones own family or group of friends (statistically more likely to be the person who abuses a child). Above all, they are vastly more likely to be hit by car than abused by a stranger, so I would rather not be distracted from those dangers.