Recently featured on our local news, and I know I have experienced it-
Video monitors are on a frequency that can easy been viewed by other products. On the news segment, the guy drove up a street and could easily identify homes that had a baby, and knew right away if the baby was in the crib, sleeping, awake, etc... The implications are scary... a burglar might know if you are home, if everyone is asleep, if there is a baby in the home, etc...