Privacy is just one argument against installing video cameras. Unfortunately it only inflames somebody elses rights.
I have and will continue to profer that there are more productive ways to increase safety (cost vs benefit) and the cost is not just $. The major cost is the technical challenges including installations and support vs the benefit gained.
This is the # 1 reason why this proferred gizmo has not moved to the top 10 list and is unlikley to do so in the next 10 years.
There are other more delectable fruit still hanging lower on the tree that we are still picking.