It's a rather odd question to pose within the framework it's been given.

You don't change those attitudes by letting more offenders go free, that is simply a retrograde step.

Factually if you remove anonymity, I believe most of those involved within this area will tell you the reporting of those offences will markedly decline. If so less crimes will be prosecuted, and more criminals will not face punishment, because the crimes will go unreported and as such it will reduce the detterence effect of any law.
I don't think it sends out any such indication of the type you are suggesting, it's simply a recognition of fact, and a signal if any, that the prosecution service recognise that and are willing to address the issue in order to help prosecute offenders. If you believe otherwise I suggest you pose the question to those agencies involved with the victims, to help you understand.

If you are actually concerned with societies perception on this issue, to save confusion and misunderstanding,you would be better advised to address that issue in a clearer way, and not confuse it with other issues.