We were 'blissfully ignorant''of' the problems that had occurred.
She was 'ignorant' about the dangers of the drug.
They were 'ignorant' [='unaware'] 'of' the facts.
(..) You cut off her resources. Regina would be nothing without her high-status man candy... ...technically good physique... ...and ignorant band of loyal followers. Now, Cady, if we want this to work, you are gonna have to keep hanging out with them like nothing is wrong. Can you do it? I can do it. (..)2004 Mean Girls