Originally Posted by acrylix

You can try blocking them in .htaccess, but that won't have any effect on the ones which are not even visiting your site. Read this article below to see how these referrers are appearing in your GA stats without actually visiting you:

[Updated] darodar.com referrer spam and should you be worried? - blackMORE Ops


This quote from the article above pretty much sums it up (example using darodar.com):




You can set up a filter to remove these types of referrals from your stats in GA. Other than that, there isn't that much you can do about them.