Apparently you've never snuck into that orphanage and eves dropped on her.
I did that. In fact, I spent 24 hours in the orphanage and obversed everything, hidden away so that they would display their natural daily routine. Nobody was ever physically abused. In fact, Grelod also wants to get rid of the children and wonders why there haven't been any adoptions recently, which makes me wonder who in there really is against the adoptions and why.
Grelod seems definitely to be the noisily barking dog who doesn't bite.
So, you'd essentially murder someone only because they isn't polite or
nice and only because some wicked psychopathic child wants someone murdered. This works of course for people who want to
join the DB, but for people who just want to initiate their questline to wipe them out, it shouldn't.