The worst thing I ever did was probably in Sims 2...I put the ticket machine on my Sim's lot, so that customers would come, thinking it was a business. Then I used the tombstone cheat object and killed each sim that entered the lot. I have a picture on an old hard drive somewhere of my sim lounging on a lounge chair on the front lawn with a bunch of dead Sims laying around him and the grim reaper looking around like ' the fuck happened here?!' Rofl
The most i think I've done in 3 is had my male sim try to impregnate every female in town. Lol