Blocking referrer spam by domain - is 403 effective
I'm about to implement the following code to block some referrer spam a client has been receiving. Is a 403 the most efficient way (I believe the header size is 0 bytes, or at least small) of redirecting the request, or are there other options I should consider?

    RewriteEngine on
    # Options +FollowSymlinks
    RewriteCond %{HTTP_REFERER} spammer-one\.com [NC,OR]
    RewriteCond %{HTTP_REFERER} spammer-two\.com
    RewriteCond %{HTTP_REFERER} spammer-three\.com
    RewriteRule .* - [F]

Blocking referrer spam by domain - is 403 effective
===

I'm about to implement the following code to block some referrer spam a client has been receiving. Is a 403 the most efficient way (I believe the header size is 0 bytes, or at least small) of redirecting the request, or are there other options I should consider?

    RewriteEngine on
    # Options +FollowSymlinks
    RewriteCond %{HTTP_REFERER} spammer-one\.com [NC,OR]
    RewriteCond %{HTTP_REFERER} spammer-two\.com
    RewriteCond %{HTTP_REFERER} spammer-three\.com
    RewriteRule .* - [F]
