No, you're wrong.
Code:
http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=96569
How does Google handle nofollowed links?
In general, we don't follow them. This means that Google does not transfer PageRank or anchor text across these links. Essentially, using nofollow causes us to drop the target links from our overall graph of the web. However, the target pages may still appear in our index if other sites link to them without using nofollow, or if the URLs are submitted to Google in a Sitemap. Also, it's important to note that other search engines may handle nofollow in slightly different ways.
They're saying it causes them to drop the link from the overall graph they have of the web. So how exactly are they taking nofollow links into account?
It's saying the only way the pages will appear is if OTHER pages that ARE NOT using nofollow link to them.
You're basically confused about 'users' and 'webmasters'. *Everything* is from the webmaster. It's the webmaster's site. If he allows users to create **************** links then he those links are from HIM, not the users, from HIS site. The algorithm doesn't differentiate between 'users' and 'webmasters'.
People are really not understanding what we're dealing with. This is a compuer running an algorithm. It's not some omnipotent being who has concepts of users, webmasters, spammers or any other sort of category. It ranks pages based on content and their position in the larger network of sites, specifically the networks of related sites. It all basically just comes down to a graph and content. That's it. It's not complicated. Why do you think facebook are taking the approach of a semantic web by having page owners label pages as 'articles', 'books', 'tutorials' or whatever else and having users 'like' pages. Because computers and algorithms are nowhere near the level of intelligence of humans and we can't have programs tell us with any great deal of unmanipulatable accuracy where pages should rank in a social graph of pages with relevance being a high priority.
Anyway google's explanation is pretty damn clear to me. If anyone else still wants to argue that google takes nofollow links into account during serp calculation then go ahead and make a fool of yourself.