If it will try to connect to any open wifi, I can definitely see why'd you want to disable the wifi at a hardware level, since at that either you let it connect

If it will try to connect to any open wifi, I can definitely see why'd you want to disable the wifi at a hardware level, since at that either you let it connect to the internet in its own, insecure way, or use your secured wifi network - in both cases it'll phone home.