Sorry, I'm out of my depth. It's beyond my rhetorical capabilities to have a serious discussion about it being OK for even a "mature" 9 year old to be having unrestricted access to cybersex chat rooms and hardcore porn.
That said, I thank you for opening my eyes. I think I understand how many conservative, Christian folks feel when confronted with things like gay marriage. Perhaps they're not evil - they just can't shift their worldview up by 10 orders of liberality. My own sexually liberal views are as alien to them as yours are to me. So sorry, and good luck, but I can't engage with this.
That said, if you allow your own mature 9 year old daughter or so to have laissez-faire, unmonitored sexual relationships and write an article about it, I'd love to read it.