And those two separate questions are both ones that no other package manager even bothers to ask! /usr/local does start off empty on OS X, but it's where every

And those two separate questions are both ones that no other package manager even bothers to ask! /usr/local does start off empty on OS X, but it's where every random .pkg you download likes to put stuff. You'll get mixing unless every non-app you install comes from a package manager. On FreeBSD every package that didn't ship in the default install goes there. There's a reason that MacPorts uses /opt/local by default.