Thanks for the link 
Between this and the fact that PouchDB doesn’t support being able to purge documents either (so I can’t even do it myself manually), it pretty much just demolished the data architecture for my app. It means if the dynamic security model changes, there is no way to get rid of local data in the application that the user no longer has permissions too without deleting the entire database and resynching everything from scratch. That just isn’t gonna work. Back to square one 