I was thinking maybe a section for hacks/reproductions could be a good thing too. However, I would only include reproductions of pirated games, hacks, and translations of games not released outside of japan. Any reproductions of games released either in EU or NA should be prohibited.
An while I am not necessary against reproductions of very expensive games (as for many of us that's the only way we'd get our hands on em), it's only so as long as they are clearly marked or on different colored carts. Preferably I'd like the rom to also display it.