Our PLE students are currently doing an assessment which involves them manipulating images and sharing the results on Flickr with an appropriate description and tags. The rationale for doing this is so that they can learn some rudimentary image editing skills, but it's also a Trojan horse so we can introduce them to Creative Commons. The students were told that they may use as source material "images you own (e.g. photographs you have taken) or original images covered by Creative Commons licences".
And the result?
Holiday snaps. We've made them so paranoid about copyright that they're not willing to take the "risk" of reusing existing resources, so they're just putting up their holiday snaps.