@Evil Emperor Proteus
Done. Here is the code to use in Tampermonkey (chrome), just remove the header to use with other script managers.
// ==UserScript==
// @name Derpibooru User Hidder
// @description Hides posts and comments from listed users
// @match
https://derpibooru.org/*
// ==/UserScript==
(function() {
let names = []; //Insert names you want to filter here, like this: [“username1”, “username2”, “username3”].
let posts = Array.from(document.getElementsByClassName(“block communication”));
posts.forEach(function(post) {
names.includes(post.firstChild.children[1].firstElementChild.innerText) ? post.style.display = ‘none’: ‘’;
});
})();
Tested and works, if you have issues make sure you have the right name inserted into the “names” array.