In 2004 I was at Disneyland with my family, and we were in line for the Indy attraction. This girl in front of us, older than me, says to her dad "Who's Indiana Jones?" I involuntarily squealed/screamed at the thought of anybody not knowing who Indiana Jones was. She should not have been allowed on that ride.
Also, a good friend of mine had never seen them before... until I found out. He said he never saw 'em because he thought they were "dumb" (yet he likes Transformers, go figure). But I have managed to force him to watch Raiders and Temple so far, he has admitted to liking both. I hope to get around to the other two soon.