Regardless of all this talk, there's no difference with 2 pilots up front anyway, if the other crew member got up to stretch his legs I can guarantee I wouldn't see the Crash axe spike entering my skull anyway as I would be looking the other way......Pretty simple really, and introducing a flight attendant would arguably reduce safety in my opinion...Its like regulating to prevent a bee sting while walking on clover, you can regulate but you can't stop it....