What's the discussion out there is, you cannot block those spam referrals like vampirestst, Villainstat, Uglystat and Zombiestat. All these have a notorious (spam) profile set even by Google and it's advised not to click those links on your Dashboard. They may sometimes lead you to web pages containing malicious pieces of software that effect your PC. Moreover, stat counters and Analytics doesn't include traffic from these sites, but the Blogger does. Also you don't need to worry about AdSense income and blog's health. It is difficult to block such websites even for Google, because there are thousands of such spam websites or even more. If one such spam website is blocked by Google officially, the next minute will be a chance for another. So, I think Bad always co-exists with Good and all you have to do is 'neglect it.'