This isn't a good idea.

I use noscript and I rarely will let it load 3rd-party Javascript. The more times I have to click "temporarily allow ..." the more i hate your site. As a user, I don't like every site telling Google what I'm doing. Google is becoming the panopticon of the internet. Forcing users to load content third-party content is a sign that you don't respect their privacy.

IE8 in private browsing mode will block 3rd-party scripts that are referenced from more than 10 (by default) sites. This includes all this Google stuff and Google Analytics.