If you have a GPS unit in your car, keep it hidden when your vehicle is unoccupied, especially if you pre-programmed addresses in it. GPS units are a popular target of thieves. Having it in plain sight is an invitation for someone to break your window and steal it.
And, if that's not enough, consider this. You're out shopping and a thief steals your GPS. They turn it on and click "home" from the list of pre-programmed addresses. By the time you return to your car, report the crime and write up a report with the police officer, the thief will have also robbed your home.
Realistically, you probably don't need to program home into your GPS. Chances are that you know how to get there without any help! If you really want to program it, call it something else. Label it "Bill" or "Susie" or something that only you would know is your home address. You could avoid a major hassle.