That's the thing though - at least from my point of view.
If you set up a website to help people out, then you don't do it for your own sanity
Closing it down without warning just seems to go against the mindset of setting it up in the first place.
As I said, I'm not judging what has happened or why - I just know if I ran a forum I would wind it up in such as way that everyone was aware and all outstanding threads were resolved as best they could