(From #640) Add non-normative guidance on removing any privacy sensitive information from exposed device labels.

While heuristics for this are not well-established, this would include personally identifying information beyond model and make. Things like serial numbers, customizable OS or Bluetooth device name labels that may include a user's login name or their machine network name. If such information is suspected or detected, best practice is to remove it and replace it with generic text containing no more information than type of device and model of manufacture.