Building up the walls

Is this a sign of the times? One of my neighbors is having workers increase the heights of his exterior walls, not by much but by just enough to prevent a wall jump!
When you walk around and really start looking, most of the walls that were originally 6 feet high are now 8 feet tall and with additional barbwire on top.
So by tomorrow the bricklayers' job will be done and the neighbors will be better protected against intruders!
As simple as that!