Yes, I have killed sims off for various reasons. Sometimes I just don't take to them for whatever reason and then I get an itchy kill switch finger and plot their demise. Sometimes it's because they're cheaters or have broken up sims who have been in long term committed relationships. Sometimes I just feel like it.
A lot of times I'll throw a bunch of single sims with varying personalities into a household and see what happens. I usually make sure there's a lot of fire hazards to increase chances of deaths. With clubs and vampire auras it's now a lot easier to do emotional deaths.
