In our instructions in The Commons, there is a thread about deleting posts. It reads:

please don't delete your posts once they have been responded to. This is extremely irritating for everyone as the following posts don't make any sense.

I believe that the same should hold true when posts are moved. Especially after they have been responded to. I believe the courtesy of a simple, short post would be appropriate.
If you can't sleep, then get up and do something instead of lying there worrying. It's the worry that gets you, not the lack of sleep.
-Dale Carnegie