Those deleted topics, I think that they are only soft deleted, if that is the case, administrators of the forum still have access to them and can restore them in special forum called archive, but all that depends of administrators, I asked for plugin for stopping bots to post spams every second day, which is 2 minutes work and still haven't received answer from them. Administrators should give more privileges to moderators, or just to only one, make him super moderator and give limited access to administrator panel, that way the forum will be make into better place about us the ordinary users of the forum.