Romans 13 is about how to behave and if you run afoul of local customs, and receive punishment for such, that punishment is righteous because you were out of line. Example: if you go to a gay bar to stop dudes from hooking up because it is a sin, and all the gay guys beat you up for it, that is a godly punishment because you shouldn't have been there acting like an asshole. At least, that's what makes sense to me. Romans 13 is clearly not about blindly obeying every government command because Christianity was illegal for hundreds of years and yet, there were still Christians for all those years.