Plus I don't think a normal user is expected to know what's copyrighted and what isn't. If they were then in theory they could be 'done' for looking at a website where the owner had put up a copyrighted image or if they looked at a video on YouTube that was copyrighted.
It's just not practical to expect your average Joe to research the copyright status of everything they look at online, hence why as far as I know downloading is not against the law.
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