TheOptimizationIdiot - 3:44 pm on Apr 9, 2013 (gmt 0)
...therefore the links don't either.
If the links don't exist, why does Google state in their support they may use the anchor text from the links to index a URL for a site when they can't index the page due to a robots.txt block? (If you search for "Google indexing pages blocked by robots.txt" - no quotes - in your favorite search engine you'll likely find many cases where it's reported.)
While Google won't crawl or index the content of pages blocked by robots.txt, we may still index the URLs if we find them on other pages on the web. As a result, the URL of the page and, potentially, other publicly available information such as anchor text in links to the site, or the title from the Open Directory Project (www.dmoz.org), can appear in Google search results.
Sometimes they'll even index a URL only when they have a reference to it and no data for it. In my experience robots.txt is not the way to remove a page or content from the web. There's a status code  for purposely removed pages and that's what I've used and would use again to remove a page.
The requested resource is no longer available at the server and no forwarding address is known. This condition is expected to be considered permanent. Clients with link editing capabilities SHOULD delete references to the Request-URI after user approval. If the server does not know, or has no facility to determine, whether or not the condition is permanent, the status code 404 (Not Found) SHOULD be used instead. This response is cacheable unless indicated otherwise.
The 410 response is primarily intended to assist the task of web maintenance by notifying the recipient that the resource is intentionally unavailable and that the server owners desire that remote links to that resource be removed. Such an event is common for limited-time, promotional services and for resources belonging to individuals no longer working at the server's site. It is not necessary to mark all permanently unavailable resources as "gone" or to keep the mark for any length of time -- that is left to the discretion of the server owner.