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?
http://www.google.com/search?q=linking+to+this+website+witho...