I do not maintain my personal blog. My blog was hacked 7 months ago, most of the pages were deleted automatically. A week ago I discovered few of my pages have hidden text (the text background was set to white) and when I selected text I found crap links.
Just a WARNING to anyone who is using Wordpress, Joomla or Drupal, these days few people are distributing plugins which will inject their website links in your CMS after few weeks or months. The worst part is you won't see them if you are logged in!
I know these plugins but for the sake of preventing spam I won't name them because anyone can post their website links to blogs who have installed these plugins.