Here are a few you want on your list
Code:
RewriteCond %{HTTP_REFERER} ^http(s)?://(.*\.)?roberc\.lv.*$ [NC,OR]
RewriteCond %{HTTP_REFERER} ^http(s)?://(.*\.)?fusker\.lv.*$ [NC,OR]
RewriteCond %{HTTP_REFERER} ^http(s)?://(.*\.)?home\.nl.*$ [NC,OR]
RewriteCond %{HTTP_REFERER} ^http(s)?://(.*\.)?nciv\.nl.*$ [NC,OR]
RewriteCond %{HTTP_REFERER} ^http(s)?://(.*\.)?opendirviewer\.nl.*$ [NC,OR]
RewriteCond %{HTTP_REFERER} ^http(s)?://(.*\.)?ixtractor\.com.*$ [NC,OR]
I'm sure there are a ton more. Check your web stats for "stolen objects" or whatever such category. There are a few ways to write this code I assume, I got mine off a tutorial...