I "cut" a piece of the default white post box background out and made it an image, uploaded it to my website, http://mysharingspaceonline.com and then posted it as an image here. Since it was the exact white on the white, it is "invisible" to viewers who use the PsychCentral default skin.

I think, usually, if one cannot copy an image from another site it at least gives he small red-x error box. Copying an image url can cost the person whose other site it is, extra money; every time someone here calls up the post or even the thread here that it is in, it is really at the other place and the other server "charges" the renter of that space for the view. That way sites that have a lot of views/members (like here, for example, which is partly why DocJohn owns instead of rents this site space) have to pay more rent since they get more use, which usually means they make more money for the renter, hence the renter is charged more too. One-price/"free" sites just make it so you can't copy from there to elsewhere.