How to Stop Spam Bots from Ruining Your Analytics Referral Data

A few months back, my agency started seeing a referral traffic spike in our Google Analytics account. At first, I got excited. Someone is linking to us and people are clicking. Hooray!

Wrong! How very, very wrong. As I dug deeper, I saw that most of this referral traffic was sent from spammers, and mostly from one spammer named Vitaly Popov (or, as I like to call him, “the most recent pain in my ass”). The domains he owns have been giving our company’s site and most of our clients’ sites a few hundred sessions per month, enough to throw off the analytics data in many cases.

His sites aren’t the only ones I’ll cover in this how-to, but his spam network has been the biggest nuisance lately. If you’re getting spam referrers in your analytics, you should be able to follow the same steps to stop these data-skewing nimcompoops from spoiling your data, too. Why do I need to worry about blocking and filtering these sites?

There are two main reasons I’m motivated to block these on all sites that I work with. First: corrupt analytics data. A few hundred hits a month on a site like Moz.com isn’t going to move the needle when compared to the sheer volume of sessions they have daily. However, on a small site for a local plumber, 30 sessions per day is likely going to be 70% spam referral traffic, suffocating the remaining legitimate traffic and making marketing analysis a frustrating endeavor.

Second: server load and security. I didn’t ask them to crawl or visit my site. Their visits are using my server resources for something that I don’t want or need. An overloaded server means slower load times, which translate to higher bounce rates and lower rankings. On top of that, who knows what else they’re doing on my site while they’re there. They could easily be looking for WordPress, plugin and server vulnerabilities.
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