no, it wasn't from you Mark, it was from a fellow amateur photographer. i definitely wasn't trying to quote or misquote you.
maybe as a way of testing that advice i will try to print some of the photos i've uploaded and compare their quality to originals.
as for Ning (don't know what that is), facebook, flickr...no
As others have said already, if its on the Internet, people can "save" a copy of it. Now to really scare people...If you post a photo file on any web site (photo file being a JPEG, GIF, TIFF, etc.) and ANYONE visits the page on which the photo file is displayed, they ALREADY have a copy of the photo on their computer (they just have to know enough to know where to look for it). Only real way I've seen around this fact, is images which are part of a Flash presentation.
I think there probably is no fool proof method. Thieves steal, you' ll never change that. The best you can do, IMHO, is to upload the smallest file you can that will look good on the screen. It doesn't matter what you do as a preventive measure any thirteen year old at any jr. high in the country can crack the code and steal the photograph.