There is a question on Super User that seems to be copied at
If you scroll down to the bottom of earthwithsun.com you'll see another striking likeness; 7903 of them.
"earthwithsun.com" is obviously mirroring superuser.com. They must have some script for copying the questions, comments and answers. I do not see any links back to Super User, or any other notifications of where the content is taken from.
Is this a concern? Is there anything that can be done about it, and should we care?