“What if the thief breaks the window and takes the key from the inside to open it from the outside?” asks one internet user.“How many thieves bother picking locks? They probably have a better chance of being caught because it takes longer than, say, breaking a window,” wrote another.
Some also mention the additional fire safety provided by leaving the key in the lock:
“People tell me to take the key out, but after experiencing a gas explosion and a fire, I know that those critical seconds gained when the key is already in the door are vital and can save a life.”