Yep, as others said, never neutral. People and cars have been injured. Recent examples:
Car rolls after parking brake fails
Quote:
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Mueller said he set the parking brake, left the transmission in neutral and turned the vehicle off. Mueller said he then heard a loud pop, and the vehicle started to roll down the hill.
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more here
Woman run over, pinned under her own car near Lake City
Quote:
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She reportedly didn’t set the parking brake and was struck at low speed by the front of her car, knocking her down and pinning her underneath.
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link
In my manual, I park in first, autos in park, and I use the emergency brake if there's even a slight incline.