你可以参考cvs中的.htaccess:
RewriteEngine on
#RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ wakka.php?wakka=$1 [QSA,PT,L]
SetEnvIf Referer
"(freebuy|-teens|filthserver|hustler1|babeplayer|buy--|rape|incest|sex|ravish|adult|teennude|porn|gay|voyeurism|theamateur|analmania|hardcore|pussy|pee--pics|webcamss|Sex|directorydrugs|xxx|anime|yytyt|ybbsu|bit35|aiwomen|pee-girl|pissing-movie|x-pictures|net-pic|pee--girl|spb).*\..+[/]*$"
bad_site
SetEnvIf Referer
"(\.ya\.com|aiwomen|pathfinder|vicodin|babeplayer|6x\.to)" bad_url
order allow,deny
allow from all
deny from 66.154 207.68.98.5 env=bad_site env=bad_url
从第六行开始就是对referrer banning的规则,你可以看到CooCooWakka主站使用这一措施还是可以有效对付这种垃圾的。