Discovered recently that Electric Wizard were kinda dicks back in the day. “At the time, we were pretty bad people. I got arrested for arson of a car, outside a police station. Tim [Bagshaw] went to nick a crucifix off a church roof so we could use it onstage…”
R. L. Burnside killed a man “possibly at a craps game.”
Varg of Mayhem Burzum burned a couple churches and killed a bandmate.
I could list other examples, but would like to hear from other people and other music genres.
Hyper Potions. They split due to the other member being involved in pedophilia and rape, which shocked me when I heard about it.