No. As I mentioned above the message shows to a member in a group that can't post anonymously. ( Admin is editing this member's reply)
Look what you should do in order to see this message.
1. A test forum that has allow anonymous content feature enabled.
2. You can use the member group. Create a new member in this group for testing, and this group has no permission to post anonymously.
3. Admin group has permission to post anonymously.
4. Create a new topic on the test forum.
5. Login as the new member and reply to the topic that was created by the Admin.
6. Reply to the topic ( Remember this group has no permission to post anonymously, so this member won't be able to see the option), Just add any random comment.
7. Logout from the member's account.
8. Finally, login in as an Admin and edit the test member reply, and now you will see this message.
Now after you have seen this message. Give permission to member group to post anonymously, and then go back to the same reply and edit it. You won't see the message again, yet if you remove the permission and edit the test member reply you will see the message each time you are trying to edit it.
BTW I am using latest version of IPS.