I really feel like this is going in circles.
That's because you reported this as a possible overall problem of the Anti-popup not working, instead of asking about a specific case.
Simple question. Can the visual range of the terminal ground clutter (and jet blast barriers at KDFW) be upped or not? I'm not trying to pass judgement on design decisions.
Now that you are being specific, I can reply with a specific answer: I'll have to check this but, as far as I remember, those objects are turned on/off using LOD so, for that object, the Anti pop-up will not have any effect, because those details are a LOD part of a larger object, which already has its range maximized (so the Anti pop-up wouldn't affect it), but the smaller details are a LOD of it, so they will appear as coded.
In any case, after my first reply that not all objects would be controlled by the Anti pop-up setting, you might simply assume that, if an object you are interested in, doesn't seem to be controlled by the Anti pop-up setting, then you would know that object either uses LOD or has another optimization in place, so it's of the "non Anti pop-up-controllable" type.
As I've said, LOD is faster, if we were to convert all the smaller objects to be separate Addon Manager objects that can be controlled by the Anti pop-up setting, they would result in big stuttering when loading/unloading at the default Anti pop-up setting.
And, as I've said, we are planning to allow LOD to be user-controllable so, users would free to kill their fps, if they want, but it's not there yet. It won't require updating the scenery, probably just an updated Addon Manager. No release date for this is planned, but it should make it before KIAH is released.