Some crime ridden storyline would be awesome, I don't think EA would completely accept murdering people directly or whatever but they already have some things that may be consider as bad but it's like it's always just one action with no repercussion. Maybe you could be a mafia boss and order to "take care" of a sim or something where they just left the scene (the sim would be alive after that but maybe they could fear you) or just simply have some kind of bodyguard.
The sims 2 was exquisite, when I was younger I didn't really payed too much attention to the townies and their stories but my God they're so awesome and interesting. Maybe I'm making the same mistake again with sims 4 because I haven't played much with townies but I really feel there's not much into it. Am I missing something? I just hope I'm playing the game all wrong or something.
As I said, many packs have played with the idea of an evil storyline but to me it just falls short in comparison to the good storyline.