Well, it's a typical american stance, isn't it? Just as they tried to justify "torture light" (waterboarding, playing loud music for hours and hours, forced sleep deprivation etc.) despite of the UN Committee's recommendations urging the US to change it's stance and it's ways. Some principles are just too important, in my opinion, to make exceptions from and to derogate from. To take another example from the torture-discussion, there are many who are in favor of allowing such "torture light" in the case of so called 'ticking bomb-scenarios', where it's absolutely urgent to get hold of information. But I'm proud of the european tradition in that sense, that even in such circumstances it would still constitute a breach of the law to use such methods. There was a famous ruling by the European Court of Human Rights on this issue, where Germany was found in breach of the prohibition against torture. In this case, the information they retrieved wasn't even reliable. Information retrieved through torture-methods in most cases cannot be trusted, as people say whatever you wanna hear in such cases.
To draw a parallel to what we're talking about here, allowing for some to be publicly shamed but others not, just because "the general public deserves to know", doesn't sit well with me at all. All human beings should be entitled to a minimum level of right to privacy, as is stated in multiple international human rights documents (UDHR, ICCPR, ECHR etc.). The reason for it being that only then can the individual thrive and grow (better him or herself etc.). Which in turn benefits society. A society ought to include, not exclude.
The general public does need protection, but that is the task of law enforcement to ensure. Every John and Jane Doe out there doesn't need to peep in and create mass hysteria over something they cannot control. It's not like they're entitled to take the laws into their own hands anyway. At the end of the day, it's law enforcement that are forced to deal with criminals, so it ought to be that way altogether. They should keep the lists to themselves, monitor certain people and open up investigations as prescribed by law whenever there is a reason to.
I like the last sentence in this article:
http://www.forbes.com/sites/timworstall/2011/06/15/sex-offenders-and-the-human-rights-act/
But I'm gonna rewrite it just a little bit. Everyone gets human rights, not just the ones you approve of.