So the kiddy porn on your node is not saved in a readable format without the key. It would be bad if antivirus software insisted on deleting or cleaning a database file!
Discussion
I was wondering when someone would bring up the XOR’ing of the blocks but I that’s still just basic decoding… just like decoding a jpeg from Bitcoin blocks that aren’t XOR’ed. The xor key is hardcoded unless you specify your own in the conf file. So it’s not a secret.
I’m not saying kiddie porn isn’t available from the blockchain already. But I am saying it does take work to possess it