That may seem like a good solution for some sites, but the name of the page and the requestor's IP address and other information is also 'leaked' to jquery.com. This is not always welcomed. For example, a company has an acquisition tracking site (or other legal-related site) and the name of the targets are part of the page name (goobler, foxulus, etc.) which get sent as the referrer page and IP address to jquery.com or other third party sites/CDNs. While not a security threat, you may unwittingly be recommending an unwanted information leak.