[chaot]

The process in another forum: When you send your post and in the own interim turnaround time someone else has posted, you will be alerted by a pop-up info.
Then it's up to you to take into account the still unknown post or not.

This overlapping of two post described by @JSWolf happens quite frequently, especially in the 'hot phase'. For the system profs of MR such a scheme would certainly easy to integrate.

Of course nobody may be allowed to request deleting other posts for any reason - except it's an illegal one, but here we're not talking about this.