What's so funny about HoPe, MERCY and the Pacifist way?

The right thing to do: everyone has their definition of right and wrong.
Should you always follow your morals? Or is sometimes the right thing to do to abandon them, to sacrifice them for the sake of everyone else's safety?
Error, Nightmare and the Gang know no MERCY. No matter how many times they're defeated, they never stop hurting people.
Will the Stars keep following their morals? Or have HoPe, MERCY and the Pacifist way become obsolete?