Oh come on. That's an immature viewpoint. Just because some other sites don't give credit, means you don't have to either? That reminds me of when I worked as a campus police officer, caught some kid stealing food from a residence kitchen, and he said, "Everyone else does it."

Does that mean you're in the clear? No.
At least you put up links to the source SITES, but still not to the actual people/webpages, which is what really matters.
At this point it just seems like it's laziness on your part keeping you from doing what you know is right.
Anyways, not to rant for too long, here's my desktop. It doesn't change much, really!