Evitando bots e user-agents maliciosos via .htaccess do Wordpress

.htaccess

#Block Against User-Agents and Bots
<IfModule mod_setenvif.c>
 SetEnvIfNoCase User-Agent ^$ keep_out
 SetEnvIfNoCase User-Agent (casper|cmsworldmap|diavol|dotbot)   keep_out
 SetEnvIfNoCase User-Agent (flicky|ia_archiver|jakarta|kmccrew) keep_out
 SetEnvIfNoCase User-Agent (libwww|planetwork|pycurl|skygrid)   keep_out
 SetEnvIfNoCase User-Agent (purebot|comodo|feedfinder|turnit)   keep_out
 SetEnvIfNoCase User-Agent (zmeu|nutch|vikspider|binlar|sucker) keep_out
 <Limit GET POST PUT>
  Order Allow,Deny
  Allow from all
  Deny from env=keep_out
 </Limit>
</IfModule>