My thought on barbed wire inside vs. outside. In my younger years, I could climb a chain-link fence, get to the top, and jump down on the other side. Granted, none were higher than 6 foot, but a seasoned person with no fear of heights could do the same with a 9 or 10 foot fence no problem.
Let me add, if the barbed wire is on the outside, I’d just leap a bit farther out and avoid it. But if it’s on the inside, it presents an additional obstacle.
Of course, at my age now, I’m not hopping any fences, regardless of barbed wire status.
I posted links to the photos after they got pulled, did you see them? For a relatively fit non-elderly man, they could be climbed but it would take a bit of time due to the wire on the inside. Enough time to get shot. Fences are 12 ft.