"That which is hateful to you, do not do to your fellow. That is the whole of the law. The rest is commentary."
Rabbi Hillel (c20 BCE)
That's what the some thought. It did a far better job than barbed wire.
Ferris channels John McCain this morning
Concertina wire is some nasty stuff. Even if you cut it, it will still slice you up when the other layer fills in.