What do you mean by clean up threads?
IMO it is better to have the threads, so you have a record of the report, and if you or your mods took action on it, you can post in there what you did or did not due.
With that being said, I am sure it is very possible to have it as a email, but that will have to wait till Joe can get around to adding such a feature if he wishes to, or has the time to do.