I'm basically thinking aloud here so some of the points are probably obvious.
Most people use Flickr, Photobucket, Picasa or Imageshack to post photos,yeah?
If you remove an image from your account it will disappear off the Wam, yeah?
Since wayback I've used Imageshack where you don't need an account, so there are no albums of the photos I've put up, but now you have to sign up.
I've chosen to change and will now use Picasa so I take it I must leave all my posted Photos in the my Picasa Web album, yeah?
Now I've told myself that it makes sense, I hope