Not sure if you will agree that this is a problem, but we had an issue where somebody got a Reply Ban in a thread and he then just stared editing his existing posts. 
I believe that a Reply Ban should also block the ability of the user to edit his existing posts in that thread.
Tested in an XF Demo.
Cheers

I believe that a Reply Ban should also block the ability of the user to edit his existing posts in that thread.
Tested in an XF Demo.
Cheers