Hmm, it could solve some issues, providing the image collisions are improbable.

I guess if one would incorporate the images into a website and a client it could make address substitution less likely. Say, the client would be displaying the image once the user would enter the address into the client. Without an integration into the client it might be a bit hard - I doubt most of the users would bother checking the website by themselves and one could always temper with some third party checks.