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Interesting. So do you have to put your fob in a bowl so it won't be moving to prevent it from being relay attacked, or some such?

Yes but I would assume that coming home and putting all your keys somewhere to lay down is a routine for most people.

Lots of people sure. Mine stay on me til I go to sleep typically.

This feature can still protect you if it works for enough people that it's no longer worthwhile to attempt to unlock a car this way.