I like lots of different art, so was tempted to join in, and then realised the difficulty in getting permission to use the images so pulled out. What a plonker they probably think I am. But it really is a dilemma. How can I go round espousing the responsibilities of digital citizens if I don't play by the same rules?
The images on facebook are sometimes directly from the artist and usually require specific permission. Sometimes they have been copied - and then who owns the rights? Is it the original artist who may or may not have given permission or is it the copier who may have used it and adjusted it in some way?
And then there is the issue of all the shared jokes and stories. Are we allowed to share them? What a can of worms!
Creative Commons, I hear you all saying. But these copyright-free or otherwise images do not often contain the very art that you desire. I also need to learn a lot more about how long after death copyright is still an issue.
A hint that I can give about searching for suitable images: Make sure you search images using google Search Tools that give you appropriate permissions.