such as the net-wireless stuff
It has been pulled in by the wireless set. Most spins explicitly install this when they are created.
So it is valid.
How do some packages end up in the world file, eventhough YOU never installed it yourself?
Look here:http://git.sabayon.org/molecules.git/tr ... kde.common
This is the so called "spec" file Molecule™ uses to build our spins.
So in order to build the KDE spin, we take the Spinbase ISO, throw a list of packages on it (It really uses Entropy to physically install those packages THUS recorded to the "world" file.) and then it would pull some tricks and convert it to the Sabayon...K.iso file.