i have spent far too much of my life building towering walls with no arches, without windows without any view to the outside world. i would much rather have liked it if i would have built fences instead. fences are moveable. you can push the rows and rows of wire or wood a foot to the north or a foot to the south or make a curve in the line. fences don't block everything out, they don't keep everything in, and they don't hurt as much when they fall. walls, on the other hand, crash and burn and take months and months to rebuild. fences? fences can be put up in a day or two depending on how difficult you want it to be to get in/get out; fences can be taken down in a day or two depending on how easy you want it to be to get out/get in.