This is a sensitive and controversial topic, so I'm going to save my opinion. Instead, I'll forward this along to Product Management since this is probably a topic that they've discussed.
A possible workaround may be to have a Terms of Service agreement that shows up when anyone associates to the wireless network that's hosted and provided for by the end customer. It could have a clause stating that accessing the wireless is agreeing to allow Network Administrators to track sensitive data for troubleshooting use.
Note: The RSSI is also used to calculate signal strength/quality to an AP. Without the RSSI, VisualRF is not the only component that's going to be disabled. It would also effectively disable the ability to track client health over the wireless, meaning network admins would not be able to troubleshoot poor client connectivity from AirWave.