I dunno, but it's not really my idea of "art," either...
lol
In seriousness, you've basically paraphrased the issue. If you draw a line, WHERE do you draw it?
If you draw it too wide, I believe there are plenty of laws that can be used to clobber people who have truly abused or exploited people. But if you draw it too narrow, you seriously risk punishing innocent victims, stifling expression, and chilling creativity and culture. Now THERE's a risk to a free, liberal, creative and tolerant society.