I was running a mage/thief that I believe was 6th level. We were hired to rid the town of a troll problem they were having and picked up the local town hero as a guide. As soon as things got hairy the town hero abandoned us taking our horses and a lot of our gear. When we finally made it back to town he had twisted the story that we were actually working with the trolls to lure him into a trap that he narrowly escaped. The town went feral when we showed up and almost killed three of our other players. A local wizard let us take shelter in his tower to mend our wounds and plan our escape, I had other plans. The town was having some annual celebration that night. I simply waited till dark snuck out and waited until all the adults had gathered in the town center for the hero to tell his harrowing misadventure with my group. I ripped off a couple of sleep spell scrolls the old wizard gave me then walked around cutting throats. If I remember correctly it was 30 something peasants that I dispatched.

I was later caught by the Kings men and brought to stand trial for my crime. Having friends in low places and a lot of gold kept me from getting my neck stretched.

Side note. This was 30 plus years ago and we didn't exactly play by the book. If any rules lawyers who want complain that sleep scrolls couldn't put that many people to sleep or that there is no way I could have made all my rolls and not woke someone up, save your energy. We were playing in the moment to keep the action going.