Dupe Content Issues - Does "noindex" Work?

duplicate content & noindex

[siteseo]

Our company uses a web analytics program feature which allows us to track which "creative" a user clicks on from a page by adding a variable to the URL. IOW, we'll have two links from the home page to a product page - one from a banner and one from a text link. They both point to the same page, but one URL has /click=1 (MOD_rewrite from?click=1) on the end of it so we can tell what the user clicked on. This of course creates duplicate content for G, as it sees two "different" pages with the same content.

I've tested the "noindex,follow" thing before and I'm not entirely convinced that it works. What we can do is script the page in such a way that if there's a "click=" value in the URL, give a "noindex,follow" to the robot. Anyone know definitively whether G obeys this, and whether it can be used to prevent dupe content penalties?

[ciml]

Robot exclusion in META tags should completely solve your problem, but you might lose crawl depth if your site is large.

Personally I'd cloak the extra URL element from Google, but any small mistakes in the code can be costly.