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.
(..) - Just after lunch. - Professor, don't believe them. We want to sit at your feet and learn. We sit at your feet, ignorant, but so willing. You leave his feet alone. Professor, they want to make a fool of you. - Are you making a fool of him? - Me? (..)1957 Funny Face
(..) Hold it! - Good. Get her in another outfit. - Put on the shebop. None of you seems to realise you're trespassing on private property. You run around, ignorant of the fact that I can have you put in jail. - For the last time... - You're getting tiresome. What are you doing? Let go. Let go of my arm. (..)1957 Funny Face