These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: My Little Pony Friendship Is Magic S 2 E 4 Luna Eclipsed
It's no use trying to change or get rid of a negative reputation - some people will keep spreading it, even though they know it's not true. Instead, you should play to everyone's expectations of you, let them define who you are (at least in public), and generally go along with the herd. You do want to be liked and accepted, don't you?
Pinkie's reception in this episode is divided. Her pretend to be scared of Luna act is seen as either getting into the spirit of things, or just being plain mean.
Broken Base: While not as divisive as otherepisodes (it's of the highest rated episodes by Hasbro), either this episode was the best episode for Luna or the worst thing about her.
Fountain of Memes: Being an Ensemble Darkhorse, practically everything Luna said or did in this episode went on to become a meme. "The fun has been doubled!", CANTERLOCK, and "THY PRINCESS OF THE NIGHT HATH ARRIVED" are prominent examples from many.
Genius Bonus: Zecora is dressed as an enchantress/storyteller with spiders in her hair. In African folklore, stories are the domain of Anansi the Spider.
The Scrappy: PINKIE PIE. Not once, not twice, but three times she inadvertently wrecked Luna's slowly trying earn the trust of Ponyville's citizens. Even though she later explained that she was acting all along, it didn't stop many of the older viewers to exclaim at the time "Pinkie, you're not helping the situation."
Luna. The poor girl tries, but due to a lot of different things, she keeps making things worse and worse. Who can blame her for finally getting completely fed up with everypony treating her like a monster?