I don't think that's an example of passive voice.

What are these people thinking?

Some of them put language there like "please read these terms and conditions carefully before using this web site...".

How detached from reality can you become? If they find themselves in a lawsuit and want to argue that the other party should have read the T&C. Wouldn't any court throw out that argument immediately because there is now way to expect a normal person to read some terms and conditions linked in a footer of a webpage before reading/using it?

Actually one of my pet peeves is that websites continually update their copyright notices. I've always felt that's not how copyright should work. If you update a website, the copyright should take effect when the content, say an article, was first published. Just because the page gets served up in 2009 doesn't mean you get to slap a copyright 2009 on there if the article is from 2003.

Alas, I bet the lawyerly interpretation is that each downloaded HTML file is it's own licensed copy and perhaps copyright comes into being at the point of the successful HTTP request.