Whether one agree's with Linus or not, I always have to hand it to him for saying what's on his mind without mincing any words! On a personal note, I happen to agree that some tasks, especially switching among wireless networks, should not require admin rights. As for printers, if no third party software (tarballs, RPMs, DEBs, etc.) is required for whatever printer a user attempts to add (CUPS supports many printers out of the box) then no admin rights should be required to add it.
AMD Phenom II 64 X6 1090T Black Edition
8192 MB DDR2 RAM
nVidia Quadro 600 w 1024 MB DDR3
Sabayon 13.x 64 Bit KDE, (Limbo enabled)
"Better to remain silent and be thought a fool than to speak out and remove all doubt." -- Abraham Lincoln