It's a huge problem for us, we manage analytics on a large group of sites and reporting back to the client has become a huge pain. We have to setup custom filt

It's a huge problem for us, we manage analytics on a large group of sites and reporting back to the client has become a huge pain. We have to setup custom filters for all of these. Google does have a feature to automatically remove know sources, but it's not turned on by default. Here's the announcement: https://plus.google.com/+GoogleAnalytics/posts/2tJ79CkfnZk https://plus.google.com/+GoogleAnalytics/posts/2tJ79CkfnZk We also run Piwki on all our client's websites as well and they block this junk automatically: http://piwik.org/blog/2015/05/stopping-referrer-spam/ http://piwik.org/blog/2015/05/stopping-referrer-spam/