if i may offer an opinion as a younger member...
As my computer is in the privacy of my own room, it makes it really easy to look at porn without a worry, but teh truth of the matter is no matter what, if the kid wanted porn, they'll find a way to o look no matter what. I dont exactly share what i look at with my parents so they have no clue but it doesn't mean i dont respect them, nor does it mean i'll get a twisted view on reality.
If i were a parent, like absorbentishe, i'd just have a talk. If anything porn has me less inhibited about how i view sex, has me more open towards the healthier practices of it, and that's nothing but good.
Finally, if i may ask, will you be equally disturbed to find your child looking at somehting very violent? I find that if i go to a movie w/my parents and there's sex, my mom wouldnt want me to see...but if it's violence, everything goes