Alright, here's the dirt:
As of 2345 CDT on 04 Sep 2007, I was checking in on the forum just in case someone else had posted something for me to take a look at. Boy, was there. The latest member at the time ALEXANDERa had embedded a large number of pornographic images. My first course of action (the only one I know of to maintain our minor-friendly state) was to remove the offensive thread. Afterwards, I sought what other courses of action I could take, and found that there was nothing aside from posting a comment here.
If I took any action in haste or out of order, please just let me know and I'll make sure not to adjust such in the future.
In summation, I would advocate as strong a ban as you can put on this person without warning.