Isn't that like a fire hazard!? and those elements draw a tremendous amount of battery power which is why they are super fused! Heated Seats have heft fuses on them. I didn't realize how power hungry heated elements were until I did a heated steering wheel retrofit in my car and almost had to use an extra inline fuse to keep it working properly.
It is also VERY important for heated elements to TURN OFF after the ignition is off. Which is why heated elements use a specific fuse section behind the ignition fuse in the fuse bay. So everything behind the ignition fuse MUST turn off with ignition otherwise the battery would die AND the car can catch fire overnight.
I won't even mess with that.