The Who's active-block is suddenly on 4.3 displaying who is currently using the editor / writing a post. 

There seems to be no built-in way to remove this, other than removing the block or removing the permission to see who's active for member groups. 

For any users of my plugin (Post Anonymously) for example, this is quite the privacy concern. 

Please make this optional :) 

Yes, please do.  

@TSP you're terrible at business. 

Make a new plugin (Typing Anonymously) and get double the money!! 

If a user is concerned about showing up in the online activity list then can choose to login anonymously.

@TSP damn, Charles just ruined your business model.  Sorry buddy.