On the shopping cart screen there is an option that reads:
If you do NOT want us to share your images on our social media pages please UNCHECK this box. The automatic checked box means you are ok with us to share these images on our social media page and or use them in social media marketing material. If we plan to print any images for marketing we would email you for direct permission beforehand.
If you know you would like for no orders to ever be featured or for any orders to be featured please feel free to let us know at email@example.com and we will make a note within your account.