Idk about the Note but my wife's Charger works this way. If you're more than a few feet from the car, you can't use the button or sensor to unlock the door, nor use the button to start the engine.
Edit...so to answer your question it is possible for someone to gain entry while you're standing right there, not unlike having a traditional hand held key.
Edit...so to answer your question it is possible for someone to gain entry while you're standing right there, not unlike having a traditional hand held key.