Pleroma uses the ACL properties on the Create activity to determine the recipient set, and the ACL properties on the child object to determine the message scope.
So, you could do something like send a Create activity addressed to as:Public with a Note that has followers-only scope. Then you could send these Create activities to an instance with a poor reputation. Then you could take some screenshots.
Not that I am proposing anyone do that. But it could be funny.