I don't see anywhere on those sites that you listed, where they are hotlinking jpg's from anywhere than from their own sites.
Code:
<img class='img-responsive' src='/thumbs/P-PMH08PpUwB_so_fO2ixpgvWxXCqkFGuGt_pQTYRYYHxFf339BzK5z1O9Eo0wCbF7kOwQrI9SbzzX-Vj2x8nA.jpg' title='View Porn Image' alt='Bbw - Big fat porn clips sex photos comments jpg 488x366'>
Can you be more specific and list the page, and which images are being hotlinked ??
