Nor do I think that artists and writers can only licitly produce works suitable for the preteen girl market.
I am paying attention, though, to see what direction Iceland is going to go on this one. They have (as I understand it) virtually -zero- conservative cultural or political input --- Christianity there being nearly extinct --- so the whole impetus is coming from feminists.
It'll be interesting to watch.
I went to a (nominally) Christian college, which still had a Religion course as a requirement for all majors. The course I took was "The Bible and Modern Moral Issues." As part of the class, we were broken into small groups that had to develop a panel presentation for the whole class.
I (an art history and history double major) was paired with two females, one a womyn's study major, and the other a pre-law English and poli-sci double major. We were all upper classmen (or upper classwomyn in the case of the second), and we all approached the topic from the perspective of our disciplines.
I compiled a multipage handout with images of paintings, sculpture, sketches, etc. and passed it out like a test for all the students in the class to vote on whether each image was "art" or "pornography." There were a couple of revelations from this exercise. A big one was the important of context. Despite his sleazy personality and loathsome character, Bob Guccione was a technically accomplished photographer who understood composition, color, balance and other aesthetic essentials. One of the images was a photo clipped from a Penthouse magazine (admittedly one of the relatively sedate ones) that when presented on its own merits was unanimously voted to be art. Similarly, an obscure Rembrandt engraving viewed outside of its context was almost universally seen as pornographic, so context is an essential consideration in the manner in what people use to decide what is pornographic exploitation of the human body and what is artistic elevation of the human form.
The second major "finding" was that, even outside of context, there was a lot of gray area. That is, there are pieces that certainly have what most consider to be artistic merit, and yet also tend to arouse the baser instincts. Generically, these would best be defined as "soft core" or "erotica," but many of these achieve their visceral response not through nudity, but by the suggestion or symbolism of it.
Finally, some of the most graphic depictions that students felt served "no legitimate purpose," came from medical texts.
I guess my point is that I would trust a generally moral populace to sort through issues of context and propriety and police its own members by social sanction rather than increasingly onerous laws. A generally immoral populace will, if left to its own devices, destroy itself from within.