author here, I posted about publishing the smart contract[1] which might be interesting to some people as I had no idea how much it would cost prior to doing this.

The source code is on etherscan.io[2] so you can check it for yourself, there are no functions that allow me to remove a post by someone. Whatever ends up there will stay there. Images and videos are not hosted on the blockchain though (thank humanity it's already large enough), so there are always ways to get rid of CP. Right now most of the images there are from imgur.

[1]: https://cryptologie.net/article/425/publishing-my-smart-cont...

[2]: https://etherscan.io/address/0x470fb19D08c3d2eB8923A31d1408c...

This isn't a new problem… https://www.quora.com/If-illegal-material-e-g-child-porn-wou...

Good point not only in regards to CP, but about one being able to pull bad things out in general.

I wonder too. Most likely can pull em from whatever front-end is presenting the ledger but they stay in the blockchain, which makes the legality of hosting a node interesting ... Not really how Steem handles this either ... but they would be a precedent...