Quoted By:
The truth is that Fauna was testing you.
She finds her fanbase annoying and obnoxious, so she wanted to see if they are at least good people. The announcement stream was the way it was because she wanted to see how you would react. If you would start gossiping, blaming everyone except yourselves and bothering the other girls to say something.
The correct reaction, the one which you did not provided, was confronting Fauna, asking her reconsider and continuing supporting her until she suddenly announced that she will not actually be graduating. I made all of this up but it would be really funny if it were true.