Bill Henson sparked a massive media outcry back in 2008 for an exhibition that was quickly and foolishly labeled "child_porn" by the Australian Media Machine. The Roslyn Oxley9 Gallery in Sydney, Australia was raided by police and several of Henson's images were seized. Some his images, those seized and creating such a media scrum, feature young girls right in cusp of adolescence. The rest of Henson's work is dark, harsh and incredibly moody and it seems that the combination of these aspects with the misunderstanding that Henson was trying to sexualise these young people has lead to such an intense media storm.
Below is one of the images seized by Police preceding the later dropped court case against Henson under the Australian Child Protection Act. 20 of 41 of his images were seized.

There is some interesting writing on blogs all over this issue,
Here and also
Here are links to a couple of them...

Personally, i find Henson's work incredibly powerful, dark and very moving. his images are imbued with a sense of gritty darkness and i am continuously drawn to them for this. In terms of weighing in on the "porn" debate i dont feel as if i need to...but if our society has come to a point where art (photography or otherwise) that pushes our social boundaries, makes us sit up and take notice, makes us question things or provokes a powerful emotional response is going to get the artist locked up.......well..... i might as well quit now.

I also find it very weird that i feel the need no wait, i feel "socially obliged" to put turn on the "adult content warning" for the blog because i have that image in here....hmm....