I'm reading this charitably as you saying that laws that criminalise distribution regardless of intent or knowledge need to be changed to recognise that with the internet people can effectively commit crimes without knowledge or intent. This is particularly relevant where distribution of material (child porn, terrorist material) is criminalised.
This seems a really difficult area that's almost incompatible with the way we do criminal law, because intent and knowledge are so hard to prove either way. Even where there's plenty of circumstantial evidence of intent it is not going to prove it either way.
You could plan to murder somebody for years, leave an evidence trail and then run them over by complete accident. Should that be premeditated murder or manslaughter? In the eyes of a jury it will almost certainly be premeditated murder. You could black out at the wheel and for a while have no knowledge that you have killed. From the philosophical perspective the lines are blurry: Only the individual can actually know, and given the amount to which people can self-delude themselves, even that isn't guaranteed.
Juries do not make decisions on reasonable doubt, and often default to balance of probabilities. Depending on the jurisdiction, when a unanimous verdict cannot be determined a majority one is accepted.
Let's say I have a HDD I write random data to as a block device. What are the implications for me in twenty years if somebody creates an image file format that can decompress some of the linear subregions of my random HDD data. I haven't the time now to do anything but a very simple analysis of this. Intuitively this depends on the size of the drive and the size of the compressed file. Let's say for arguments sake it can encode a prohibited piece of data in 10kB.
At what point of completely random storage material are you likely to have a forbidden piece of data? Well, each terrabyte contains approximately 1e12 such linear subsequences. And we need 1e3010 such subsequences to match a forbidden sequence. So that's 1e2998 or so TB if there is only one forbidden piece of data. With more I think the birthday paradox kicks in. Now if we can encode the forbidden data in 8 bytes or such then we reach the problem much sooner. I doubt that will happen somehow.