I just don't think that the home life of these girls is, or should be, linked to the events in the park. Being outside, being sexually 'experienced' (whatever that means), even flat-out asking for sex does not mean that sex has to happen. That is not to say that home and family life is not something that should be investigated, just that there are no connection between the two. In an ideal world, of course, problems in the home would have been flagged up far in advance of this case.
I also have a problem with the idea that these men 'genuinely believed' that the girls were sixteen. Did they 'genuinely believe', or did they just not care?
Sure, they say that they genuinely believed, but then their liberty hinges on that fact, so of course they would say that. The reports that I've read seem to suggest some texts, and perhaps some Facebook contact, before sex occurred. That's simply not enough. It's nowhere near enough, and if we have a culture in which sex between people can take place with very little getting to know one another, then we need to establish basic questions and basic checks.
How can you 'genuinely believe' anything when you've had little or no interaction? I 'genuinely believed' my partner was over the age of consent when we met, not because he's over six foot tall with a beard (I was in school with fifteen year old lads who had those!) but because we met in a bar, we went on a date where we spoke about Sesame Street and cartoons from our childhood, he picked me up in his car. He described his four or five fulltime jobs. I went to his house and saw his degree certificate hanging on the wall.
I have no issue with consenting adults having sex with one another as often as they like, as soon after meeting as they like, whatever. But the idea that one participant can be very youthful looking (because sixteen might be legal but it's YOUTHFUL) and the older one doesn't have any assurances whatsoever other than their clothes, or even their word? And this stands up in a court of law? Ridiculous. Absolutely crazy.