So, is this the ultimate list of ‘donncha’s rules for stopping spammers’ (skipping Cookies for Comments and AVG LinkScanner stuff):

`
# stop requests with no UA or referrer
RewriteCond %{HTTP_REFERER} ^$
Rewritecond %{HTTP_USER_AGENT} ^$
RewriteCond %{REMOTE_ADDR} !^64\.22\.71\.36$
RewriteRule ^(.*) – [F]

# stop requests to wp-comments-post.php outside of /
RewriteRule ^(.*)/wp-comments-post.php – [F,L]

# bad user agents for Trackbacks
RewriteCond %{HTTP_USER_AGENT} ^.*(Opera|Mozilla|MSIE).*$ [OR]
RewriteCond %{HTTP_USER_AGENT} ^$
RewriteCond %{REQUEST_METHOD} ^POST$
RewriteRule ^(.*)/trackback/ – [F,L]
`