As others have mentioned, any wires in your walls could potentially start (or spread) a fire. And I believe fire/building code requirements can vary even within one state. I live in NYC and I think we have fire code rules re: in-wall wiring that other parts of the state do not. Can't blame the FDNY for being stricter than elsewhere, they're the ones that have to figure out how to put out a fire on the 60th/70th etc. floor of some very tall buildings here.
If you’re not 100% certain whats required in your municipality (or close to 100% at least), consider hiring a licensed electrician to run new wiring.
