Referrer black list for NGINX

blacklist.conf

map $http_referer $bad_referer {
    hostnames;

    default                           0;

    # Put regexes for undesired referers here
    "~social-buttons.com"             1;
    "~semalt.com"                     1;
    "~kambasoft.com"                  1;
    "~savetubevideo.com"              1;
    "~descargar-musica-gratis.net"    1;
    "~7makemoneyonline.com"           1;
    "~baixar-musicas-gratis.com"      1;
    "~iloveitaly.com"                 1;
    "~ilovevitaly.ru"                 1;
    "~fbdownloader.com"               1;
    "~econom.co"                      1;
    "~buttons-for-website.com"        1;
    "~buttons-for-your-website.com"   1;
    "~srecorder.co"                   1;
    "~darodar.com"                    1;
    "~priceg.com"                     1;
    "~blackhatworth.com"              1;
    "~adviceforum.info"               1;
    "~hulfingtonpost.com"             1;
    "~best-seo-solution.com"          1;
    "~googlsucks.com"                 1;
    "~theguardlan.com"                1;
    "~i-x.wiki"                       1;
    "~buy-cheap-online.info"          1;
    "~Get-Free-Traffic-Now.com"       1;
    "~free-floating-buttons.com"      1;
    "~event-tracking.com"             1;
    "~qualitymarketzone.com"          1;
    "~get-free-social-traffic.com"    1;
    "~copyrightclaims.org"            1;
    "~alibestsale.com"                1;
    "~snip.to"                        1;
    "~traffic2cash.xyz"               1;
    "~snip.tw"                        1;
    "~googlemare.com"                 1;
    "~nufaq.com"                      1;
    "~topseoservices.co"              1;
    "~trafficgenius.xyz"              1;
    "~for-your.website"               1;
    "~share-buttons.xyz"              1;
    "~traffic2cash.xyz"               1;
    "~годом.рф"                       1;
    "~nufaq.com"                      1;
    "~free-traffic.xyz"               1;
    "~ɢoogle.com"                     1;
    "~lifehacĸer.com"                 1;
    "~eyeserp.com"                    1;
    "~addons.mozilla.org"             1;
    "~motherboard.vice.com"           1;
    "~google-liar.ru"                 1;
}

server.conf

# Add This in your server directive
if ($bad_referer) {
    return 444;
}