I find it interesting that lots of people on here seem to be saying that it is okay for a child to have access on an adult's computer, but not okay for them to have their own computer.
However, a lot of these posts seem to be making a lot of assumptions...
For example - they seem to assume that it is okay for a child to use the family computer, which they assume will be in a public space. What happens if the main computer is located in a study away from the main part of the house, so that if the child uses it, they will have to do so unsupervised?
They also seem to assume that if a child has a laptop, then they will be using it in their own rooms. Why? My DD has never used her laptop in her own room. She only ever uses it when sat at the dining room table (usually sat next to me, whilst I'm mnetting )
They also seem to assume that a child should just be able to access the parent's computer. But what about those of us who have work computers that the children are not allowed to access? Or like mine, where I am not able to change the security settings? Using a parent's computer may actually be putting the child at more risk, in these circumstances.
It really is a red herring to assume that using the family computer is the safest thing for all children. As I said in my first post, everyone has got a different situation, and so people will respond differently, but it is far too naive / simplistic to assume that everyone can / will find it appropriate to just let their child use the family computer. (For us, that would be about the riskiest thing we could do - hence, she has her own!).
Also, I find Duchesse's comment also a red herring. An 8 year old looking at porn. I would be seriously worried how an 8 year old would have any knowledge about porn at all. I think far more questions need to be asked than just internet access. There is a much bigger problem there IMHO.