If you do not wish Pinterest to pin your images then you can place a small piece of code in the custom head area of your site that will prevent them doing so.
The code you will need to use is as follows:
<meta name = "pinterest" content = "nopin" description = "Sorry, this user does not allow pinning" />
For the code to function, you will need to place it in the "Custom <HEAD>" area of each of your pages that you do not wish Pinterest to pin your images from.
To do this, follow the steps below: