I noticed today in my Google Analytics report that I had quite a spike of traffic in the last few days. “Huh, that’s odd!” The source seemed to be mainly referrals, so I dug in to see where it’s from. Hm. These don’t look like legit referrers, do they?

So yeah, it looks like this is a thing now. Rather than setting up an exclude filter (as detailed in that link), I instead used the “valid hostname filter” technique from the Definitive Guide to Removing Referral Spam. Let’s see if that does the trick…