We live in an apartment building with two main doors that are usually locked. Once you get past those doors, then you have to get through our front door.
So I have to admit that in the past, I wasn't that hardcore about locking the door. But then Mrs. Bee pointed out that if someone was inside our apartment building, then they could just waltz right into our place and steal Charlie. So now I lock the front door.
Do you lock your front door?