Dear platform creators for Bluetooth, Please implement a privacy and battery saving measure. Where once I turn off the paired device, such as a car or headphone

Dear platform creators for Bluetooth, Please implement a privacy and battery saving measure. Where once I turn off the paired device, such as a car or headphones, the platform automatically turns off the Bluetooth radio. This prevents tracking with-in stores or offices. Saves battery power. And prevents the device from auto-connecting to my car during ignition. Just because I was using Bluetooth before I arrived does not mean I want to use bluetooth once I depart. I currently manually do this everytime.