I for one, welcome our Ponrexian overlords!
I got into it from watching THIS. I especially liked Fluttershy's bit. Then i realised that the audio might be a gag dub, but i was still watching a tiny pegasus step up to a huge dragon, and i just had to go watch this series...
I like the irony of someone using a homophobic insult while there's a rainbow around them. That and any decent use of that rant from Tropic Thunder is okay with me.
And Black Knight Leader, the song mostly just hints at things.
In the Rainbow Factory, where your fears and horrors come true
In the Rainbow Factory, where not a single soul gets through
Apparently this is supposed to imply mass murder or something. I've never been good at lyric interpretation. Mostly I just find the tone of the song suggests there's something sinister happening which combined with the lyrics could put this song in the horror category. I did find this, a little while ago.
https://www.youtube.com/watch?v=n7HrijDkfHc
I'm assuming the first segment is basically just flipping off some fansite.