I have tested a solution to the diaper noise problem. To date it has worked perfectly. What I have done is to simply play the saxaphone when in public. Granted, it's only an alto saxaphone, rather than a tenor or baritone. But even at the smaller size the effectivness is obvious.
Let me note, and you may check for yourself, that there are no restrictions against playing a saxaphone in public. Indeed, have you ever entered a store or restaurant or any other public space where a sign, "No saxaphones allowed (or aloud)" was posted? Point made!
Since I began playing the saxaphone wherever I go, not a single person has ever aske me, "Are you wearing a diaper?" A few, however, have been moved to mistake my personhood a particular part of my anatomy covered by my diapers, and have told me so.