Wow. What a horrific grift. If they had built 100% effective devices, it’d still be a grift. But this is just…disgusting honestly. They’re stealing money from already underfunded school systems, and giving a false sense of security where there appears to be absolutely none. These don’t look effective in the least, against anything really. I guess they plan on the shooter being someone who walks on the ceiling, because the only angle these things look to have any chance to protect someone from is from directly overhead.