Any "evil" things I can do in this game?

Put a flock of Flamingos in their yard.

Convince them to break up with each other or cheat with another sim.

"SimsLovinLycan;c-18148950" wrote:
If you like to play with occults, you could give the evil neighbors supernatural abilities. Then you can orchestrate vampire break-ins, have a spellcaster come over and start setting things on fire, and/or have a werewolf come over and start devouring the good furniture! XD

"kostasmpi;c-18148964" wrote:
Convince them to break up with each other or cheat with another sim.

Spell casters have a love spell and love potion, you could use either one.

"catmando830;c-18148962" wrote:
Put a flock of Flamingos in their yard.

Or cover it with garden gnomes. Or invite your friendly neighborhood vampire over after dark. Then visit the lot with vlad or a hungry Lilith.

I'll try to be creative here.

Have a klepto vampire enter the house and steal stuff. Vampires can open locked doors. Or just have it drink from them often. Or set the house to Nexus... whatever the lot trait is called, and bats will randomly come there to bite people.

Fill a room with playful decor to kill them from hysteria. Making the house haunted will help push them off the edge, provided the specters are happy.

If the toilet is pranked, use it and don't fix it. NPCs know nothing of plumbing.

Have a technophobe sabotage their electronics.

Any of them like to read? Snatch their books.

Uproot/ harvest from garden plants.

Be a werewolf and trash the place.

Litter the place with dirty dishes.

Give nausea potion.

If it's a vampire, give them food with garlic.

Be a spell Caster and sizzle their clothes... or turn them into an ice block, or an inanimate object!

I would imagine you can get them cursed by having them drink too many potions at once. Expert potion mixers can make their potions never work as well.

That's all I can think of right now.

"Kerrigan;c-18148801" wrote:
Putting a bee box out near the spot where Sims spawn onto the lot or by the front door is pretty wicked.

I'm a big fan of those....also putting it right next to their beds so they get stung as soon as they wake up

wow a lot of ideas. will definitely do a lot of these suggestions, thanks.

"somewhsome;c-18148717" wrote:
Making them a bad quality pufferfish? Or is it too evil? They might die haha.
Also gifting a flower arrangement that was scented with a death flower will age up a sim. If they are an elder — they will also die. ?
Oh, and also you can train a dog so it will attack other sims.

It's fine. I guess if someone will die, then I will make the other partner beg for the dead sim's life to bring him/her back lol I heard you can beg for their lives.

"jpsulsuldagdag;c-18149605" wrote:

"somewhsome;c-18148717" wrote:
Making them a bad quality pufferfish? Or is it too evil? They might die haha.
Also gifting a flower arrangement that was scented with a death flower will age up a sim. If they are an elder — they will also die. ?
Oh, and also you can train a dog so it will attack other sims.

It's fine. I guess if someone will die, then I will make the other partner beg for the dead sim's life to bring him/her back lol I heard you can beg for their lives.

The other person can also offer Grimmy a death flower if you find one to spare them. For some reason, the living must offer it.