This is a newbie question: why does yaourt in Arch Linux always warn you to "please run yaourt as a non-privileged user"? I am running the following:
$ sudo yaourt <package-name>
... to install packages from "User Repo" land.
If you run it with sudo then it gives it root (super user) privileges. So you are running it as a privileged user. If you run it without sudo it should be fine.