", and by possessing it you are creating a market for it which harms more children daily."

No, this is nonsense. Mere possessing of information is not creating any market. Only purchasing is harmful. Vitalik is very logical. The point is that CP is no material but information which can be inflated (copied) infinitely.
Are you suggesting that police authorities are helping to create a market for CP by saving and analyzing such hmaterial? Or How about journalists?
Your and many other comments are hysterical witch hunt and thought policing.
Vitalik chose CP as the most extreme example to express his point. His only mistake was to expect other people to be as cool minded and logical as he is himself.