I am trying to cut back on some bandwidth leeching on a large site I help. We have over 2 Gigs of images stored, and we have just now implemented image hotlinking protection utilizing mod_rewrite. This wasn't our primary concern, but it cuts back a little. Our primary concern are the users who utilize offline browsers and things such as wget -r to get every single page on our site including images. This is a large amount of downloads.
Do you know of anything to implement to prevent this type of leeching? tia.