I mean I wanted to do the Mirri introduction quest on all of my characters. After doing it as intended the first time, I’ve noticed you can save quite some time if you just destroy the central pylons while attempting to save Mirri’s ally’s each time, killing her allies (and her brother) in the process. Basically i chose the quick route and chose to let all of Mirri’s allies die. Pretty sinister if you ask me.

There are dark choices in the game, you can join the dark brotherhood, you can join the thieves guild, you can be a vampire or werewolf. There are choices to be had in quests, you can often either be lenient and spare people or just let them die or have someone kill them.
The problem with quests that require you to be evil is that heroic types would never do them, whereas quests that require you to be heroic might well be done by evil characters as part of some elaborate plot. So questlines that require being evil prevent people with heroic mains completing them, whereas questlines that require being heroic don't prevent evil characters doing them. It's bad enough that my main can't/won't do the DB questline on account of not being evil (especially since it blocks the other pve quests in the gold coast that you have to rank up DB to access), and is still weighing up whether she can justify doing the TG one (maybe I can justify some kind of Robin Hood motive).

Let's leave any more involved evil stuff for RP guilds.