Just rewatched "Keep Calm and Flutter On" and, wow, it reminded how morally 
fucked this episode was to me. The idea of redemption drove the whole episode. 
Redemption is a typical christian and humanistic value. But applied to Discord, 
it seems so... cruel. I wouldn't force anyone to redeem himself if he didn't 
want to first.

He was turned into stone for understandable reasons, menacing the peace and 
tranquility of ponies. It was his prison. But someday, Celestia decided for the 
sake of mercy to release him on one condition: that of to be "reformed" by 
Fluttershy, read, that of not to be himself anymore.

Imagine you were in jail and I proposed you freedom in exchange of a 
psychiatric treatment that would change your personality forever and destroy 
what made life enjoyable for you. Would you accept it? There's no typical 
answer to that question, especially in life situations. But in the case of a 
fictional character as Discord, it's terrible to see such a strong character 
dumbed down that way, because the writers couldn't find a politically correct 
way to let him free without screwing things up as he did before. Lame writing 
is lame.

Now just a little song for you:

The lunatic is in my head
The lunatic is in my head
You raise the blade, you make the change
You re-arrange me 'till I'm sane
You lock the door
And throw away the key
There's someone in my head but it's not me.

ITT: KCFO and other episodes that morally challenged you.