That's why Apple makes it so damn hard (compared to any Android I've ever owned) to turn off Location, Bluetooth (and maybe WiFi) on their mobile devices.

Disabling location is annoying yes (a couple levels deep in the settings) - but disabling bluetooth and wifi is at the top level and very easy to do.

Since iOS 11, turning Bluetooth off from the control center only puts Bluetooth on a timeout until the next morning instead of disabling it permanently, as one would expect. Even when it’s off, the antenna stays on, looking for new devices. You can turn it all the way off by digging into the settings menu, but as soon as you turn it on for any reason, the cycle starts again.

I personally really like this, because 95% of the time when I turn off my Bluetooth what I’m really wanting to do is put it on pause. The times when I want to turn it off completely, I also want to turn off everything else (Wi-Fi etc.) so airplane mode (which does not time out) works great.

Similar to what rodorgas said about bluetooth, when you disable WiFi it’s normally “stop connecting to (currently) nearby wifi until tomorrow”. The radio doesn’t turn off and it still actively scans for other wifi to connect to (will connect 5min later at your friend’s house, for example).

I definitely think it’s inexcusable that the control center buttons are so misleading, but at least “Hey Siri, turn off Bluetooth” (or Wi-Fi) really does it.