well.. at least FF7 wouldn't so hard to get anymore.
If replicators did work like that in the real world, economies would collapse overnight. The second some jackass published the replication patterns for nuclear weapons we'd all go up in an inferno. That of course is after everyone replicated ten tons of gold for themselves and discovered it's now plentiful and worthless. No, no replicators please. I'm not ready for the end of the world.
I got the impression that ST stlye replicators only worked on the atomic/molecular level, ie they don't create new elements, just rearrange them into useful patterns. Therefore the above wouldn't work due to a lack of an ability to create weapons grade plutonium/uranium or gold for that matter. Creating plenty of conventional explosives, toxic substances or even some evil nanites probably wouldn't be too hard however...