Wow! I guess that either 1) they didn't even see them, 2) knew they were fake or 3) simply didn't care. At least if the cameras were real & recording there'd be a record of the encounter. If nothing else that would help for insurance and aid in ID'ing the perps for the police.

I imagine you'd want to network the cameras and have storage offsite. Otherwise the bad guys could probably just steal the hard drives for the cameras!
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman