Have you ever had a package stolen off your porch? Thankfully I'm usually home, and our porch is shielded from view, so we haven't had that problem. But, wow - I would really want to do something to the people who would dare to do something like that.
I've also seen the posts going around that recommend putting some of your old junk into Amazon boxes and putting them out on the front porch for the porch pirates. Might be a convenient way to get rid of some stuff you don't want...
