Look at it.

This is the part where you repeat the same comment and substitute in modifying the software, opening the device and putting in listening hardware, putting a microphone under your skin, attaching a microcontroller to their outside walls to analyze vibration patterns, etc. Luckily, the world doesn't operate on pedantry. They care about removing 99% of attack vectors, the remaining 1% is covered by you being on the line. If your office permits outside recording hardware, someone 'forgetting' that their device was recording is a mishap. But if it only approves certain devices and finds out you did James Bond-level gadgetry to circumvent their measures, guess what image that'll paint on you.