I have a WordPress website which accepts anonymous comments and images. We are receiving spam in the form of Russian porn, with images hotlinked from websites on the Russian domain .ru
As we are unlikely to ever need to legitimately link to a Russian picture, I thought the easiest way to not have to look at this in the spam folder would be to use .htaccess to redirect any image on an .ru domain to something that doesn't exist.
Is this possible? What would I need to add to my .htaccess?