You may not know that as soon as you pull-up to a drive-through window the microphone connection is closed and the fast-food workers can hear everything you say. Not only that, but most fast-food restaurants have wireless systems that broadcast over a frequency that can be monitored by nearby radio scanners.

So the next time you pull up to the drive-thru (though I hope most of you avoid fast food), you might want to consider holding your tongue from comments involving curses or criticisms until after you have pulled away.

One personal anecdote: In my teens a buddy of mine was into radio scanners and had a list of the common frequencies used by fast food restaurants (example from Long Island). On more than one occasion we sat and listened as people pulled up to the service box and placed their orders, complained obnoxiously before the service staff acknowledged them, and argued over things that couples argue over. When nobody was placing orders, we could also hear the restaurant staff talking amongst themselves over their radios about school, boyfriends, girlfriends, drinking, and drugs.

Remember that when you talk outside your own home or through electronic devices, anyone with the means may be listening.