I'm providing PDF documents I own in my blog for downloading. The problem is that anyone can copy the link to a PDF and post it in their web site or blog and the download might work just fine for them using WP's bandwidth. Is there a way to prevent that from happening? I've seen many topics here discussing hotlinking, but they're all related to images, not documents.
Thanks in advance.
PS: here in my blog, you can go to for example http://overdoc.wordpress.com/2009/08/04/analyse-des-donnees-travail-dirige-3/ , the download link is provided below the displayed document as "Télécharger".
The blog I need help with is overdoc.wordpress.com.