There is ALWAYS FREEDOM to change REVISE a VIEWPONT of published in subsequent note - (leaving aside typo errors)  but just like "word spoken out of mouth cannot retracted back"  short works the same way. no one can guarantee that someone didnot grab screenshot what u said/posted before in decentralized mesh. just somewhat wayback web machine archive old webpage. 

 But the delete request note lets everyone be very clear that the note was retracted. It’s fine for their to be copies and archives, but we need to show, “i want this deleted” and to not show that delete content in the user’s normal profile or threads.  

 Cool that makes sense - old retracted copy can still be floating somewhere publisher know it.