Most of the sites on Internet have copyright like:
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I myself have not noticed it in ux.stackexchange.com until now that I needed it for my question. I don't think most of people see this part, so what is the purpose of it when most of us don't see that part.
We don't have copyright issues in our country, but again most of people in our country even do this? I think they just mimic these parts just to say their site is like a real site ;). Do I have to use copyright on the footer? Why?
P.S. my site is usable by all the people all around the world some with copyright laws some without it.