This is basically why i am concerned: i found that if you go to lock/unlock your car with a toyota/scion smart key while someone within range of your car holds the lock/unlock button on their toyota/scion smart key, your car will not respond to your own key. their signal basically just interferes with your signal causing the car to do nothing. if you walk away w/o noticing, your car will be completely defenseless. no lock. no alarm. in my test, i held my key button about 60 feet away from my dads car and it interfered with his key causing his car not to lock. this also worked vice-versa. this means thieves have the ability to stake out a parking lot, for example, and, just by holding a button on their key, will be able to gain access to the cars of unsuspecting civilians. this is a flaw that should be addressed. *tr