My chapter had one but nobody used it...we ended up recycling its contents to win a campus-wide recycling challenge instead
On my campus, professors are aware of test banks/test sharing in general, and if they truly don't want their tests out there they don't hand them back. Many professors post copies of previous years' tests online anyway (which is probably why our test bank wasn't useful).
ETA: Whoops, just realized this was in the KD forum. Sorry for the crash!