Alright, someone explain this to me—why are people putting foil on their door handles?

1) A Visual Sign Someone Touched Your Door
In the morning (or when you return), check the foil:

If it looks mostly the same, nothing likely happened
If you see new wrinkles, folds, tears, or loosened foil, it may suggest someone handled the door
This acts like a quiet signal—a subtle “something happened here” message.

2) A Sound Cue While You’re Inside
If someone tries to grab or turn the handle while you’re home, foil can make a distinct crinkling sound.

That noise can function as a quick “heads-up” so you can:

Stay alert
Move to a safe spot
Call for help if needed