http://www.1-internet-casinos-online-gambling-online-casino-gambling-atlas.com/ has just blocked the right click function (not view source).
You can still view the source by clicking on View -> Source.
Unless you have a site you are extremely concerned about being copied I would tend to stay away from removing the view source function in-case this affects your SEO listing on some search engines.
Blocking the right click function is fine, and stops the simple cut and paste at a basic level.