An old village trick

Slots in the fence are a useful option to find out more and keep unwanted guests out of your home. The fence is specially made so that the homeowner can watch the street but is not visible to him. This is an old rural trick invented when video cameras had not yet been invented :)

However, there are strange things in villages. For example, fences made of thick metal. What does it look like?
Video: "Iron Barrier"
https://rumble.com/v3to5pd-iron-barrier.html