Dear Senator Craig

You might consider putting metal cleats on the bottom of your shoes, much like tap dancing shoes. That way as you tap your way in bathroom stalls you can more clearly communicate your intent via Morse Code. Of course not many people will actually understand the code however the waiting police are more likely then the average Joe. If your stall neighbor is confused by your tapping you can always resort to rubbing your hand underneath the partition.

Of course these well laid plans may be thwarted by alert airport staff. The stalls in question have apparently become tourist destinations with throngs of people taking photographs. The stalls are, sigh, being remodelled .

Good luck in all your future tap dancing.