Yes, men of God should obey the law and be good citizens just like anyone else. Then again, wicked rulers need to be careful of what they say to men of God, as demonstrated by the evil king Ahaziah,
“Then the king sent to him a captain of fifty with his fifty men. So he went up to him; and there he was, sitting on the top of a hill. And he spoke to him: ‘Man of God, the king has said, “Come down!”’ So Elijah answered and said to the captain of fifty, ‘If I am a man of God, then let fire come down from heaven and consume you and your fifty men.’ And fire came down from heaven and consumed him and his fifty” (2 Kings 1:9-10).
If such a man or woman is doing the will of God, fear telling them to stop, or to compromise or anything else of that nature.