[Rurudyne]

You can’t as easily hide your presence behind it, for one.

[House Atreides]

You can’t as easily hide your presence behind it, for one.
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But the bad guys can clearly see if “the coast is clear”. Once it’s “clear”, it’s easy to attach/anchor ropes to the top of the fence and scale it and descend by ropes down to the ground on the American side.

By the way, it’s easy to cover such sharp points at the top.

[caww]

That’s right.....the border patrol said they need to be able to see thru it....