It doesn't even make sense because you can always just go on the internet to find porn.
(The web part you mentioned is actually the frightening part of the whole thing. If they really wanted to carry their stance here to the logical conclusion they would have to filter the web or shut it out completely. I don’t think that’s what they plan or even want to do, it’s just a crappy and illogical statement Jobs formulated there. Why did Jobs say it? It seems just dumb.)