How do you teach management and the 'old guard' of IT about router root kits?
How do you teach Mom and Pop about 'drive-by pharming'? (mine excluded :)
How do you teach kiddies that 'bad people' exist and 'bad things' should not be looked at on the internet without prematurely shattering their innocence or attempting to remove their access to the internet?
Well. You don't. Manage to the edge and offer a managed service. Remove default permit.