Is your home Wi-Fi connection password protected? Ours is, and always has been, but Wired has an interesting take on why you shouldn't lock down your connection.
Thanks to doglington for the pic.
Strangers parking in front of your house and using your connection for shady things? Probably not. More probable, offering your wireless network to friends and guests visiting your house in the same manner as a glass of water. True on both accounts, but we're still going to be sticking with our protected connection.
So what do you do, keep it open or lock it up?