DOU user blocker

// ==UserScript==
// @name     DOU user blocker
// @version  5
// @grant    none
// ==/UserScript==

// DEBUG console.log('init DOUblocker');

function DOUblocker() {

// DEBUG console.log('run DOUblocker');

// Example .../users/userone/ .../users/second-user/
    var blockedUsers = ['userone', 'second-user'];

    for (let bUser of blockedUsers) {
        blockIt(bUser);
    }

    function blockIt(bUser) {
        for (let oneComment of document.querySelectorAll(`.b-comment .b-post-author a.avatar[href*='${bUser}']`)) {
            let parentElem = oneComment.parentElement;
            let maxParent = 5;

            while (parentElem && maxParent) {
                if (parentElem.className.match('b-comment')) {
                    parentElem.style.display = "none"; // or parentElem.innerHTML = bUser;
                  // DEBUG console.log(`block ${bUser}`);
                    break;
                }

                parentElem = parentElem.parentElement;
                --maxParent;
            }
        }
    }
}
// document.addEventListener("DOMContentLoaded", DOUblocker);
DOUblocker();