ya real annoying. im trying to catch the IP so i can IP block it, but so far i cant get who is doing it. should be a real simple modification to do for the usergroup id for guest users....
well for temp untill we can get a permission on this, inside the vbgallery settings, under usergroup permission editing the Guest permissions, i set No to "Can view large images" and "Can view original images". And now guest cant view the actual posting of the image, but they can see the thumbnails.
Setting no to "Can view large images" works just as good.