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”The ones with the see-thru bottoms are failures. Launch a weighted rope over the top and down the other side. Tie it around the see-thru support and you can scale over the wall easily. The ones with a flat top fail also as a grappling hook can attach to them. The ones with the rounded top and solid walls are best to prevent easy scaling”

You said exactly what I was about to say. I like the rounded top because it would make it much more difficult to grasp with anything, but the see-through slats at the bottom negate that for the very reason you mentioned. I would make the wall solid from top to bottom, with the rounded top, and then use technology of one form or another to keep tabs on what is happening on the other side. If the military can detect an approaching UFO buff heading towards Area 51 using buried sensors, etc., then this shouldn’t be that difficult.