Эта дрянь ддосит, помогло в .htaccess
SetEnvIfNoCase User-Agent ".*bingbot" badbingbot
Deny from env=badbingbot
xxx.xxx.xxx.xxx - - [xxxxxxxxxxxx] "GET /blblblblblblb HTTP/1.1" 200 22542 "-" "Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)"