I think that is really crappy and immature for them to be handling things that way. We have a girl that is leaving the end of this month. But, she's leaving to better herself and will be happier, I can't imagine anyone being rude to her. There is just no point. Maybe if we're mean she'll want to stay? That makes sense.
I'm just sorry that they can't make your transition any easier. Just remember, we will always have plenty of crap here. But, we are here for you because we want to be, not because it is the 'polite' thing to do. I hope you are having a better day today.