Rather than disallowing people direct linking to photos on your gallery (that they incorporate into their offsite blogs, webpages, etc.), what do you think of watermarking photos on-the-fly. So the original photo is unaltered, but when it is presented on an outside server, it get's a watermark, thus giving credit to the bandwidth-provider...
Jim
Posts: 2254
enable the watermarking rule, and then from its config, tell it to watermark hotlinked images.
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