Calicokat: They are your photographs that fall under "intellectual property" and you are entitled to watermark them whenever you want.
Yes, Calicokat is entitled to put watermarks on his photographs. And it definitely makes sense for high resolution images.
However even professional photographers often put less obtrusive signatures on the low resolution versions of their photos. Nobody can prevent Calicokat to use Smugmug for commercial photos
and another site for low resolution images with less prominent signature/watermark/copyright.
