nothing of interest to you or to a "spy"? I honestly don't know. Are you saying these are default folders but never have any data? But if they have any meaningful data I'd say it's of interest.
What if a boyfriend wants to see what photos his girlfriend has been taking? What if you want to see what photos your neighbor has been taking...and you find photos of your wife naked? Is that not signficant?
I don't even know if that's possible, but it appears the DCIM adn photos folders are public so that's not a good thing at all.
The DCIM folder, right down to the name, follows the standard for digital cameras. This allows image downloading just like any other digital camera, into iPhoto or Lightbox or Picasa or whatever software you use. I don't know if those specifications allow for encryption or access control (password or PIN); I have never run across a password-protected digital camera.
There are apps, including free ones, that create a hidden and encrypted image library. Some of them even include the camera functionality, so you can shoot straight into the hidden library, and several are free. So image security is available if it's a concern.