You hate a mod but still use it. I agree that the dialogue is a bit over-the-top, but at the same time it seems ludicrous how they react. You are dragonborn. You are Tamriel's ONLY hope. And they want to squabble over some other dragon and let the world burn because they want justice for something that happened 10,000 years ago.
To the DB initiation:
Aretino tells you,that Grelod tortures the kids,and if you go into those rooms to investigate if he was right( good for Good aligned RP) you can definitely see,that there are handcuffs on the walls.It's that easy,she was a BAD person,,and if you are Good aligned,you want to kill her to save the children.
If you agree to slay him, I believe you can wait to do so. I suppose you could RP the choice to lie to her. But you shouldn't have to do that. You should be able to put your foot down and say "I'm the dragonborn. FUS ROH DAH!!!!!" and she goes flying off the cliff. Time to go recruit more blades.
So what is the knightly solution? You will find no justice from Riften. Most of those kids will die or commit suicide. Do you drag her through the streets? Do you whip her until she passes out? Do you drug her and sell her into slavery? Exactly what is the knightly solution to save those kids?
Being old and evil are not exclusive. You can be both. I keep seeing posts about not being able to kill an "old" lady. Imagine a person, who gets off on beating and abusing small children, taking extreme satisfaction in the knowledge she is destroying their young lives. Just thinking about it, makes me want to go back into the game and kill her, reload the game, kill her again, reload the game, etc etc.
It's not a particular quest, but I hate how there are some quests where you can't say "no". I end up having 50 quests in my quest log that I have no intention of doing but I still get them because I talked to that one dude, and there was no option to just walk away. It automatically gets put into the quest log and then stays there.
My asshole character just doesn't want to help people with their petty problems! My mighty Dragonborn character is too busy saving the world to deal with your rat problem! My mercenary character knows that you won't give her more that 50 gold for this task, so it's not worth it! Gods, people these days... ;)