Welcome to 2013, where footers and headers make up 90% of the content. :)
You are right, we can do better. Expect a change of the public shares pages soon!
That's because the image viewer itself is optimized for mobile-first (touch gestures) but we see the problem and will see what we can do. Any suggestions would be helpful!
I can't even use the up and down buttons on the keyboard to scroll!