If your domain is pitman . us
I believe the response you received regarding RewriteBase would be more like
RewriteBase /
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?pitman.us/.*$ [NC]
RewriteRule \.(gif|jpg)$
http://www.pitman.us/images/angryman.jpg [R,L]
Then if you placed this in the location pitman.us/.htaccess
It would be in the main directory / folder of pitman . us so any folders/subfolders such as /images are covered by this .htaccess. The subfolders / directories obey the top level .htaccess unless you add a custom one in a particular folder to over-ride it.
I can't say for sure about the rest of the code right off hand, just the RewriteBase / part.