We've added a new field in the image upload box. This field is called SOURCE URL and asks users to include the URL of their image, if applicable. It's not a mandatory field.
So if you upload an image from Flickr or Wikipedia, which often use Creative Commons licenses, you can now input exactly where you got it from. Just copy-and-paste the URL into the new field.
Also, in a somewhat related request: DJ members with Flickr accounts who use Flickr photos in their articles should thank the photographers. We thinks it's always best to tell a Flickr photographer their image is being used with a link to your DJ article to show where.
Without Creative Commons, we wouldn't be able to do as much with images so we always thanks users for choosing a Creative Commons license.
You can add a simple note in the Comments box under the photo you used on Flickr, thanking the user and linking to the applicable article.