Hijacking a domain's backlinks by changing topic.
A customer from the pharmacy industry found this website ranked #1 on live for certain popular pharmacy keywords. It seemed fishy as it was a blog with some pharmacy spam content. After checking backlinks, the website showed listed in various important directories like yahoo, in religious furnishings related categories.
If you check this, you'll see that the website was in fact not pharmacy related from 1998 until 2007 when it expired and then somebody purchased it and posted pharmacy content there:
http://web.archive.org/web/*/http://www.wcpageantry.com