What concerns me is WHY would one desire to do that? I can see in the non to distant future, where we are going to have security issues with the camera in the strap. Preventing the camera noise can only add to even more problems. Paranoia over cameras in Europe, particularly the UK, is ridiculous.
Even in this country it is illegal to take another persons photograph without their consent!
The potential for good devices to perform criminal actions is always going to be a balance. I can foresee the day when we read of some perp doing something illegal with this camera. Then knee jerk governments will make us all 'pay'.
Some common sense is needed here and the sound is there for a reason to alert others what the owner is doing.