The search engine spider comes along and reads the page and then follows the redirect. However, it has indexed all of that spammy content.
When using a search engine, a user is then presented with that page in the results, and after clicking the link, is automatically redirected to another page – not the page that was listed in the results. By page I am talking about the URL and content being radically different from what the user was expecting.
What are the search engines doing to prevent this?