Meta Robots WordPress Plugins

Comment on WordPress SEO Plugins by Mark.

So far so good with your Adsense templates, I have a cottage industry of adsense sites. :)
Question: How much should users of your adsense templates use “nofollow” “noindex” plugins. For example, the ‘all in one seo pack’ and ‘Meta robots’ plugins recommend not to index/follow

1) categories and 2) tags as it creates duplicate content. Wow that is pretty radical as it will reduce the number of my pages.
Do your templates handle that or should I add something like the Meta Robots plugin and click off all the options to converse page rank etc?