We already kind of get notified when a thread moves to another forum (it shows up translucent in the original forum) so I don't see what this would accomplish. If the point you're trying to make is that it lets the user know if the thread they're watching is something they can no longer post in, then why is it just trashed and DC'd threads? Why not include threads that were just closed normally as well?
Good suggestion, but I'd also like to get informed whenever a thread I'm watching gets closed or reopened. I think that'd mean I get info about Staff Status being reopened or closed every once a staff member posts, but I don't mind it much.This layout is 💩