How's the best way to either watermark or simply stop people from downloading pictures from my gallery?
For the first http://forum.coppermine-gallery.net/index.php?board=33.0
For the second there is no good way.
to stop newbs from downloading
http://forum.coppermine-gallery.net/index.php?topic=33782.0
Best option: watermarking on the client (before uploading). There are several good apps that can batch-apply watermarks on the client, e.g. http://www.picture-shark.com/