Removing comments from a comment page is not deleting content, it's changing it. This page would be an IPNS address under the admin's control which would point

Removing comments from a comment page is not deleting content, it's changing it. This page would be an IPNS address under the admin's control which would point to some IPFS hash representing the current goatse-containing state of the page. The admin would then create a new page, which would get a new IPFS hash (since it's new content) and point the IPNS address to it. As it turns out, you cannot ever really delete information, you can simply change where your "well known" pointers point to.