> yet in case when the crime against them finally happens the footage might not be admitted as a proof.

Or there is simply not enough staff available to carry out the procedures needed to apprehend and charge the individual. Or a myriad of other things. People think law enforcement is easy.

No I install security cameras as a deterrent measure to keep people at my door front measured in their interactions, particularly when it may just be my wife at home alone.

They are mounted extremely obviously for this purpose.

I greatly hope they never catch anyone doing anything.