I've used cloning (GTW), the 'Alien Aura Serum' (GTW), Voodoo Dolls (BG), and 'Drain Life Spirit' (Vampires) unethically.
- I've cloned teens in order for my sims to raise the clones to be the perfect partners in young-adulthood.
- I've used 'Drain Life Spirit' to cut relationship and familial ties where desired (family ties for those I want in my household, marriages for those I want to romance, and on the clones so their originals don't remember my sims or their clones).
- I've romanced and woohooed with mortal sims using Vampiric Allure, then make them forget my sims afterwards using the 'Memory Erase' power from the 'Alien Aura Serum', and have them return to their lives using the 'Command to Leave' power.
- I've used Voodoo Dolls to bind sims and summon them as free plasma packs for my sims. If I've the vampiric energy, I'll just drain their life spirits instead of drinking deeply. Effectively, I'm leaving them with no memories or familial/romantic ties. Sometimes when I summon them they'll have re-married or something, and that's nice and cute until I drain them again (especially the elderly ones who've found new love just days before their deaths).