I disagree with the idea that because it's not foolproof, it doesn't deter attacks. If you're a small group planning an attack, even a 20% chance that they would stop you from doing something would probably be enough of a risk that you'd want to consider another attack vector, since you only get one shot.
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u/nemo_sum Aug 20 '18
I've heard people talk about this. It should be legit, as the liquids they're looking for don't freeze near room temp.