Rest assured, the moment one of us gets on, we get swamped with "I fell off the world, can you move me to.. pleaase?" or "I can't cross this border, map is missing, could you...?!?"
We're really doing what we can to cope with the situation.
The current falling-off behavior is a bug. It used to port you to the last valid position just as you suggest, thus it's not really an item for the wishlist but belongs to the bugtracker (which it is already since a couple weeks).