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This whistle fights fascists | How thousands of 3D-printed whistles are derailing ICE.
(www.theverge.com)
This is a most excellent place for technology news and articles.
They are armed. You should be too. And wear protective gear. They've permanently blinded people on purpose. They've already executed people in the street. Notice they aren't near anyplace where bpp is active.
An alarm won't stop a break in, and a whistle won't stop these goons from harming you.
If you really want to fight back, learn from the Mexican cartels and Islamic insurgencies.
We have data on what works.