I have a bit of another view on this attribution stuff..
There are people doing great work to get permission to use pictures..
We tell the people that the name from the photographer will stay with
the image because the license says so.. Most of the time the people
say just no.
When Wikimedia has a printingservice that doesn't attribute on the
right way it will make it only harder to get permission..,
Leave nothing but footprints, take nothing but pictures