Ghost spam is a growing problem with GA, so there is definitely a need for well-curated filters being rolled out. No marketing team wants to have their data outright hijacked by a third party. It’s honestly time Google stepped up and solved the problem themselves (by banning these sources). Their own internal feature for bot detection and spam isn’t up to par.
Ideally, you’d want to see historic data of what you’ve blocked or filtered to ensure no false-positives.
Until that day comes, there is a great free segment tool that was put out by Loganix that is well maintained that allows you to suppress the ghost referrals damaging your Google Analytic reports.
Download the Segment:
How to video for implementing the segment into Google Analytics: