.htaccess, bot spam e errore 500

[seo.in.progress]

.htaccess, bot spam e errore 500

Ciao a tutti,
qualche giorno fa ho modificato il file .htaccess inserendo questo codice per bloccare il bot spam buttons-for-website:

Block buttons for website Referrer Spam

RewriteEngine on
RewriteCond %{HTTP_REFERER} ^http ://. buttons\ -for -website.com/
RewriteRule ^(.)$ – [F,L]

End buttons for website block

La modifica mi ha provocato un errore 500.
Ho quindi eliminato il file .htaccess e l'ho ricreato all'interno del plugin Yoast in WordPress e parzialmente risolto il problema inserendo solo il codice che segue:

BEGIN WordPress

<IfModule mod_rewrite.c>
RewriteEngine On

RewriteCond %{HTTP_REFERER} ^http:/ / .buttons -for-website\ .com/
RewriteRule ^(.)$ - [F,L]

RewriteBase /
RewriteRule ^index.php$ -
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php
</IfModule>

END WordPress

Il problema è che se solo provo a ripristinare la situazione precedente all'errore inserendo questo codice:

protect wpconfig.php

<files wp-config.php>order allow, deny deny from all</files>

protects from sql

injectionOptions +FollowSymLinks
RewriteEngine
OnRewriteCond %{QUERY_STRING} (<|%3C).script.(>|%3E) [NC,OR]
RewriteCond %{QUERY_STRING} GLOBALS(=|[|%[0-9A-Z]{0,2})
RewriteCond %{QUERY_STRING} _REQUEST(=|[|%[0-9A-Z]{0,2})
RewriteRule ^(.*)$ index.php [F,L]

BEGIN WordPress

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index.php$ -
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php
</IfModule>

END WordPress

o ad aggiungere ulteriori blocchi a bot spam

Block russo Referrer Spam

RewriteEngine On
RewriteCond %{HTTP_REFERER} ^ http: //. *buttons -for-website\ .com/ [NC,OR]
RewriteCond %{HTTP_REFERER} ^ Http: // .*ilovevitaly. ru / [NC,OR]
RewriteCond %{HTTP_REFERER} ^ Http: // .*ilovevitaly .org/ [NC,OR]
RewriteCond %{HTTP_REFERER} ^ Http: // . *ilovevitaly .info/ [NC,OR]
RewriteCond %{HTTP_REFERER} ^ Http : //.*iloveitaly .ru/ [NC,OR]
RewriteCond %{HTTP_REFERER} ^ Http : //. *ilovevitaly .com/ [NC,OR]
RewriteCond %{HTTP_REFERER} ^ Http :// .darodar .com/
RewriteRule ^(.)$ - [F,L]

si ricrea il problema.
Qualcuno sa come risolvere la questione.
Grazie mille