In my forum project, I use blockchain-like elements in the sense that when one replies to an existing comment, they include its hash in the reply text, which is

In my forum project, I use blockchain-like elements in the sense that when one replies to an existing comment, they include its hash in the reply text, which is then PGP-signed. It is not a chain, however, more like a tree/web. And anyone can inspect the tree and re-verify its validity. What is on the tree, however, is decided by me, the webmaster-operator. If there are troll comments that I want removed, they're gone. But I cannot forge something by another user, because I do not have their private key. And anyone else can fork the forum and append to the tree in their own way, and I cannot stop them.