Having them being ignorant of the policy yet responsible for it's contents doesn't stop the worm infecting the network because someone who _should_ be aware of the contents connects an infected laptop to the network as we recently experienced. I would much rather spend an hour or two making sure the policy is complied with than chasing around for a day or more cleaning up after the policy is breached.
An ounce of prevention is worth a pound of cure.

-Maestr0