Does AdSense ads take your link juice?

I saw a very interesting set of comments on Reddit.  The whole thread is here.  The following part captured my attention.

Linking to other websites (where relevant) in your niche won’t have a negative effect, and may in fact have a positive one. However, Google’s guidelines say you should nofollow any advertisements. I go one step further with my method and completely block Google from “seeing” the links.

Leaking faucet

I understand what the person is trying to accomplish but I wonder if this effort is futile.  If you are using AdSense I definitely think this useless.  Since link juice applies to Google search, I think you can skip this advice if you are just using AdSense.  I am pretty sure Google knows it’s ads and will not give away link juice to them.  If you are running multiple ads on your blog, this maybe something to think about.