### 3. It Creates Uncertainty for the Intruder
Even if someone doesn’t fully turn the handle, the foil is **visibly out of place**.
An intruder may think:
* “Is this a trap?”
* “Is someone awake?”
* “Is there a camera or alarm I didn’t notice?”
Most break-ins are crimes of opportunity. Anything that introduces **confusion or hesitation** increases the chance the intruder simply walks away.
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