Considering how many famous bands there are out there, across so many genres, it's really not that surprising when someone hasn't heard of one, unless it's something like The Beatles or Led Zeppelin--bands that have been incredibly famous and popular for decades. The biggest moment I've ever had like that didn't exactly deal with a band. I knew a guy in high school who, my friends and I were shocked to discover, had no idea who William Shatner was. Had never even heard of him. We ragged him about that for years.