Kneel before Zod!
Artist @ http://www.Playfur.com
I got by many names, BhavFox is one of them
Just a view on what others think on this subject, I came across a piece on the Facebook artists group of an artist using a background image taken from a photographer on DA naturally most of this photographer's work has the usual copyright/do not edit/etc however this particular photo he mentions that he wants links to the image on how it is used.
Now how many of your chaps/girls out there would agree to contact the photographer and ask them for permission to use the photo and how many of you would not, if not why? :)
For me, Ive learnt that, creatives do a lot of amazing things for the community, whatever it is, ie photography, painting, clip art etc etc. If there are rights/rules put on an asset or even not always good to check before using any media, plus its nice to just ask the owner if they are ok with you using the media for your own work. Most creators will just say sure and move on, or even ask for a link when it is completed.
Just that form of respect to other fellow creatives that keeps the flow going. I know majority of photos that dont have any set of rules on them and it is automatically public domain but I know images on DA have certain creative common badges on them or a signature under the image mentioning the rights of the image.