I don't think it would be fair to block certain blockchains just because it had some illegal documents.
It will be much better to delete those files someway, and raise awareness that this technology can be used by evil people for purposes like that one, but that is not enough reason to block the technology.
Looks like you did not quite get it. Quoting you "It will be much better to delete those files someway".
There are no files. The picture is textencoded within the blockchain. You would have to delete a part of the blockchain to delete the picture.
A friend of mine save an entire image of Windows 7 onto the blockchain. So technically he has a Windows 7 Backup-DVD on the Blockchain for all times.
Oh I see! thanks for explaining it like that!
The problem (as I read it) is that the way the blockchain is created and operated prevents editing without massive headaches. All transactions after that block in the chain would be null and void. Reverting that much would be a wee bit daunting, you know?
Then again, I know very little about this stuff.