If they take the banner down if and because people are getting butthurt over it, I will not be happy. Adorkable made that banner, and he deserves to have it up there.
I love the banner, I think it's very cute. We've had banners focused on one pony before, so I don't see the big deal. And about the line - just because it's pro-Twi it doesn't mean it's anti-others.