Hide spammy posts on google groups

gistfile1.js

var blacklist = {
    title: [
        /\bsexy?\b/i,
        /online order/i,
        /buy \w+ online/i,
        /hot videos/i,
        /earn money/i,
        /prescription/i
    ],
    body: [
        /free shipping/i,
        /\bsexy?\b/i,
        /!!!/i,
        /hot videos/i,
        /\[link\]<\/a> ?<a[^>]+>\[link\]/,
        /cheapest/i
    ]    
};

function matchesAny(text, regexes) {
    var regex, i = 0;
    while ((regex = regexes[i++])) {
        if (regex.test(text)) {
            return true;
        }
    }
    return false;
}

var posts = document.querySelectorAll('.maincontoutboxatt table');
var post, i = 0, title, body, fontTags;
while ((post = posts[i++])) {
    fontTags = post.querySelectorAll('font');
    title = fontTags[0];
    if (!title) {
        continue;
    }
    body = fontTags[1];
    if (!body) {
        continue;
    }
    if (
        matchesAny(title.innerHTML, blacklist.title)
        || matchesAny(body.innerHTML, blacklist.body)
    ) {
        post.style.display = 'none'
    }
}