How to Block Spam Referrers like darodar.com from Accessing Website?

Question

I have several websites that get daily around 5% of visits from spam referrers. There is one strange things I noticed about this referrers: they show in Google Analytics, bu

Answer 1

According to this entry, they are never visiting your site, they are faking HTTP request to GA using your UA-code. So, it seems it's pointless to block them using .htaccess or any other method, because they never actually enter to your site, they are only sending fake "visit" data to Google.