There's also the issue of not identifying the minor involved (at least in Australian law).

So "Joe Bloggs was convicted of molesting his niece" would not be able to be reported, since it could identify the victim.

And "A man was convicted of molesting his niece" isn't really news - if it's all anonymous, then it probably needs to be a trend story. And thankfully the trend seems to be downwards, though I suspect there's still a tragic amount of unreported crimes of this nature.