Well sure, as a kid in the 60's we spent large amounts of time assembling "forts" in the woods.These things are way different. The most glaring difference being that the most puzzling structures have no timber that has been sawn or cut with edged tools. That was half the point as a kid...trying out the new survival knife and especially our lashing techniques. Explaining these things as just kids' play is a glib thought-stopper. We could speculate for days what purpose they serve, but my guess is the process stimulates something deep and fundamental in the brain of the makers...just as it did for us as kids. They are made because it feels good to do it, possibly. As a species, we ourselves have no better explanation for a lot of what we do. If BF are making these, we should not discount that simple motivation.