I am constantly seeing in my logs the same type of visitor: They have no language setting, i.e.
$_SERVER['HTTP_ACCEPT_LANGUAGE'] == ''
so it's empty, and their referrer is some scam server in Russia or Ukraine. I get many of these every day. I've been banning them selectively based on their referrer but it seems I am getting similar non-browser based visitors from China as well who have no referrer. So should I just ban these people or bots?
Examples of referrers:
http://www.odeialo.ru/ http://www.moregirls.org/ http://segway911.ru/