"Update: We decided to inform students and teachers who are leaving how they can transfer data quite easily over to a personal gmail account. Here are the instructions we provided. So far - so good. :)"
"We thought about this but I am worried about any potential abuse that might occur from these accounts. I think that may put the school in a tricky situation. I hate to base things on "negatives" but in this case that outweighs the…"
"I wonder if there's any potential value to the school from an alumni/development standpoint of allowing students to continue using a school account. I definitely get the issue of it being a management headache, but wonder whether that might be…"
"We are dealing with the same issue (first time through it). I mocked up a help sheet to send to all of our seniors showing them how to transfer their "stuff" to a regular gmail account. I think I will delete their accounts next fall but…"
"Have you called them? We have free phone support as schools. Log into your management console and click support.
Moving documents completely out doesn't seem all that bad. Mail via POP or IMAP, calendars and contacts via CSV.