Ignore mobile phones, put in a nest, whatever. It is not that hard or expensive to record footage for a few days at a time having a continuous overwrite. You

Ignore mobile phones, put in a nest, whatever. It is not that hard or expensive to record footage for a few days at a time having a continuous overwrite. You likely don't even need to go that far -Most universities have cameras everywhere, anyway, including plenty of universities that have cameras in every lab of this kind. It is also done by millions of home users all the time. As I said, yes, things can be faked, but who cares that’s not the point