I agree that in practical use, it's best just to use the key system as intended. However, a neighbor recently had their Subaru stolen and the theory was that the crooks used an amplifier/transmitter of some sort to pick up the key's signal (which was in their house, just behind the front door) and trick the car into believing that the key was actually very close to the car.
I figure the odds of this happening are very small, and the risk isn't catastrophic so, outside of doing something blatantly stupid like leaving the key fob on the roof of the car, I don't worry about it much. I don't have to worry about my appearance too much, so I just carry my key on a lanyard around my neck. Otherwise it would be too easy to accidentally leave it in a jacket or something. The problem with that "fool-proof" system revealed itself a couple of weeks ago when I let my wife drop me off at home before she took the Mazda to a hair appointment.
Still haven't figured out a good way to have a hide-a-key or, short of carrying an airtight wallet, what to do with the key when going into the water.
Personally, I think the only benefit of the power lift gate is being able to show off. I don't like waiting for it to open or close, and I'm reluctant to push it through the motor.
