I can understand not wanting to use or support static post number @BankFodder as I used that plugin too but we did have several users complain because we told them to review certain post numbers from memorized posts but it turns out that due to spammers, edits, moves, etc. that the post number was not accurate. By using this ID: number regardless of what happens to the post the numbering won't get messed up. It might not be in the topic thread anymore but you cannot reference an invalid post number which is what we have had happen quite a few times. But we do run a support site not a general purpose site so we do have a lot of mods, editing, moving, etc.
Supporting the ability to Enable / Disable showing the ID: on the post from with the ACP would be nice, but it looks like that is not going to happen anytime soon.