I am facing fake referral in my analytic

Selected answers from the Dumb SEO Questions Facebook & G+ community.

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  Jai Prakash yadav: I am facing fake referral in my analytic. I am happy to see a lot of traffic in my site but i realized its fake referral from Russia . So my question is how to stop this referral and what is the bad effect on my site. Here is my site ( deaninfotech(.)com  ;) . I am also provide analytic screen shoot of referral site.  ;
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  VINAY DODDA: Disavow the Specific Domain Using Google Disavow tool.
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  Jai Prakash yadav: +VINAY DODDA ; but how this tool work please give me a idea?
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  VINAY DODDA: The disavow tool is Google's way of allowing you to ask Google not to count certain links that point to your site. ;
  Below are the links where you can find the documentation as well as Disavow Tool
  
  https://support.google.com/webmasters/answer/2648487?hl=en
  https://www.google.com/webmasters/tools/disavow-links-main?pli=1
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  Federico Sasso: While using the Disavow tool doesn't hurt, I don't think it really helps either: those are fake referrals (we all have them), there's no actually any real link involved.
  No bad effect from an SEO standpoint so, nothing that could trigger a penguin or a manual penalty on you site.
  Two possible side effect could be overloaded bandwidth and screwed stats in your Analytics, if that fake referral traffic is too intensive.
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  Fabian Coetzee: Think it would be best just to block the referrals in .htaccess  ;http://bit.ly/15rTLM7
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  Jai Prakash yadav: +Fabian Coetzee ; our developer already used this but it still show with new url .
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  Mark Steenbakkers: +Jai Prakash yadav you could use the .htaccess to block unwanted traffic.
  
  More info: https://www.fasturl.com/support/htaccess.html
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  Jai Prakash yadav: +Mark Steenbakkers ;ohh
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  Joe Rega: I agree with +Mark Steenbakkers blocking the site in the .htaccess will show a drop in referrals in Google Analytics. 
  
  I would also block their bot in the robots.txt
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  ARcrescent: There is no problem in getting reffaral traffic. Leave it. It will also help to increase alexa ranking.
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  Mark Steenbakkers: Hi +ARcrescent in my opinion the possible benefits of a higher Alexa ranking, doesn't outweigh the risk that your website will drop in the search rankings. If you have a lot of non-relevant traffic to your website, your bounce rate will go up, you will experience a drop in average session duration, pages per session and so on. If your visitors are less engaged with your website you risk that search engines will think that your website has low quality content, and therefore rank your website lower.
  
  +Joe Rega it's a good idea to also block the websites in the robots.txt. In this case, the robots.txt would not block the fake referral because it is a direct link.
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  ARcrescent: Hi +Mark Steenbakkers ; session duration, pages per session and bounce rate are minor ranking factor in comprasion to On-page & Off-Page optimization.
  
  He should contact with webmaster of non-relevant website to remove his website link. Disavow process is not good for single backlink.