Don't know how thieves can hack into my WI-FI thermostats when I have very hard time to set them each time power goes off and common reviews say it takes rocket engineer :h
But that reminds me precaution with "keyless go" on my car.
Suppose thieves have range extenders and they can extend the sensor signal from master bedroom, via the extender at the front door and into car park on the driveway.
That allows to open the door and start the engine.
Safety precaution will not shut down the engine, even with no key present till the car stops, so thieve can make it across the city into garage and then worry how to replace remote controls.