[Bubbly]

I guess people who think they were rude to Ayu have NEVER seen on episodes with Morning Musume on Utaban. If you have seen how they were joking about Yasuda Kei you will feel like they were the nicest people ever towards Ayu.
That's how Utaban works and actually I have seen this kind of jokes in many japanese TV shows, where they make fun of their guests and all. I don't think it's this bad because, IMO, it never seems like they actually hate the person and want to be really rude or something, they just want to entertain and if the viewers keep watching a format like this they will keep it like this