想彻底屏蔽掉某些人发布的话题、回复、头像吗？不要急～点我就行了

更新：很反感看到莫些人的头像ID ？没问题
来油猴脚本修改ID头像到系统默认字母or中字头像

(function() {
    'use strict';

    // 首字母匹配颜色
    const colorMap = {
        A: 'A9C6C3', B: 'B0C4DE', C: 'C1A68B', D: 'D4A5A5', E: 'D3C4A1',
        F: 'B6C1A9', G: 'C5AEB1', H: 'C4B3A9', I: 'A9B7C4', J: 'B8C3A1',
        K: 'A9C1B7', L: 'C1B6A5', M: 'A1B6C3', N: 'C2A9A9', O: 'A9B8C1',
        P: 'B3A9C1', Q: 'A9C1B8', R: 'B8A9C1', S: 'C1A9B8', T: 'A9B3C1',
        U: 'C1B8A9', V: 'A9C1A5', W: 'B6A9C1', X: 'A1B8C1', Y: 'C1A9B3',
        Z: 'B3C1A9'
    };

    function getColorForLetter(letter) {
        return colorMap[letter.toUpperCase()] || 'A9A9A9';
    }

    function processAvatar(avatar) {
        let bigUsername;
        if (avatar.closest('div.post-infos')) {
            bigUsername = avatar.getAttribute('title');
        } else {
            let userLink = avatar.closest('a.trigger-user-card, a');
            if (userLink) {
                bigUsername = userLink.getAttribute('href').split('/u/')[1];
            }
        }

        if (bigUsername) {
            const colorForLetter = getColorForLetter(bigUsername.charAt(0));
            const newAvatarUrl = `https://www.uscardforum.com/letter_avatar_proxy/v4/letter/${bigUsername.charAt(0).toUpperCase()}/${colorForLetter}/248.png`;
            avatar.src = newAvatarUrl;
            avatar.srcset = newAvatarUrl;
        }
    }

    function processAllAvatars() {
        const avatars = document.querySelectorAll('div.post-avatar img.avatar, a.poster.trigger-user-card img.avatar, td.posters.topic-list-data img.avatar, div.post-infos a.reply-to-tab img.avatar');
        avatars.forEach(processAvatar);
    }

    function initMutationObserver() {
        const observer = new MutationObserver(mutations => {
            mutations.forEach(mutation => {
                mutation.addedNodes.forEach(node => {
                    if (node.nodeType === 1) {
                        const avatars = node.querySelectorAll('div.post-avatar img.avatar, a.poster.trigger-user-card img.avatar, td.posters.topic-list-data img.avatar, div.post-infos a.reply-to-tab img.avatar');
                        avatars.forEach(processAvatar);
                    }
                });
            });
        });
        observer.observe(document.body, { childList: true, subtree: true });
    }

    // 初始化
    processAllAvatars();
    initMutationObserver();
})();