I kinda have to agree here. If your staff can't handle it, then you should find people who can. I feel like every time you've tried to make running the site more about people here doing it instead of the staff, it's only made things more difficult.
And I don't think making the submissions handled by users is the solution. You need a set of dedicated people to make things work. There's no getting around that.
Sorry to do an off-topic here but, for god's sake, please try to not having a inbox full
I spent some time fixing what you were asking from "Secret of Mana" (automatic reinsertion) and boom, I can't sent the pm (and it's already the second time it happen).
For people who want to keep an archive of their message, use "File => Save as => .html file" in your browser and it's enough.
Personally, the next time I'll have something to send to someone and he have it's inbox full, I won't ever bother to ask it here and just give up (emails are useless, most of the time, emails with links go to the spam folder and some people don't check that folder).
Thanks in advance.
About the submission problem, just lock the submission to one submission per day for each user? (to be able to do 50 submissions in only a day is a crazy possibility).