Hey, I just saw your hack names list, and I'm wondering whether you're planning to take the games in the Games Showcase into consideration. Although they aren't hacks, a lot of people seem to be confusing them with hacks recently.
It might be useful to include a third heading, stating that these aren't hacks, but the names are being used anyway, so they shouldn't be used to avoid confusion. Most names in the Games Showcase are not used by hacks (and vice-versa); the only one I can spot is Pokémon Special Adventure (made by interdpth in Progressing Hacks and help-14 in the Games Showcase).
Incidentally, I don't think that a name rule should be enforced; after all, nobody's trademarked the names (other than Nintendo themselves). I still think your thread is a good idea, though, as not choosing the same name as somebody else's hack reduces confusion.