Perhaps queue submissions for approval? Could even show unapproved games in separate list if you don't want them hidden, then at least users could decide if they want to risk downloading some random software that could be an SD formatter for all they know.
There's a rewrite of the backend in progress that actually ties adding/editing of software entries to a user login, but I'm trying to hold off on switching out to that version until I've finished up some of the other new features that I want in it as well though.