i got "samba" use, and i tried to "emerge -av gnome-vfs-extras" [ebuild N ] gnome-extra/gnome-vfs-extras-0.99.11 -debug 0 kB cat /usr/portage/gnome-base/gnome-vfs/gnome-vfs-2.8.3-r1.ebuild contains: samba? ( >=net-fs/samba-3 !gnome-extra/gnome-vfs-extras ) so, i think that user should NOT be allowed to install gnome-vfs-extras.
yes we should protect our users... the right solution is to ditch the pack as we intended to do in the first place.
Fixed in CVS.