Wrapping aluminum foil around a doorknob may look like a clever security trick, but it offers no meaningful protection against someone determined to enter your home.Foil can be easily moved or torn and does nothing to strengthen the lock, door, or frame, making the viral hack mostly ineffective.
Real security comes from strong deadbolts, reinforced strike plates, sturdy door frames, good exterior lighting, and properly installed alarms or sensors.
So while foil is harmless, homeowners are far better protected by reliable hardware and proper installation than by temporary viral tricks that only create the appearance of security.
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