WP referrer spam blacklist (Ghost Spam in Google Analytics)

WordPress referrer spam blacklist plugin WordPress plugin to fight with more than 2040+ referrer spammers (like semalt, buttons-for-website and many more). Via my LinkedIN post: Few months ago I started to collect referral spam pages in private file un bitbucket.org. Problem was that I did not know all spammers. Then, few weeks ago, I found that Matomo (Open source analytics) started their own "project", and they did the same thing I did - collected referral spam sites to block them from Your website. On my own server I do that at server level, but some of my clients have hosting, where You can not edit server settings. This week I came up with another solution - Wordpress plugin "WP referrer spam blacklist". I will update list every week from Matomo's community-contributed list of spammers. If You have WordPress site and no knowledge about or access to server settings, I made that for You! No need for configuration! NO auto update, as we see that as possible as security hole. Plugin in background redirects referral spammer to blank page ( about:blank ). Redirect link can be altered via filter wpreferralblockredirecturi. Plugin is for sites that can't edit their .htaccess