If they lead men away from Him or create division in the Body of Christ, they are wrong. If they magnify man or self, rather than Christ, they are wrong. If men tell you things that do not agree with the Bible they are in error. If it's the same Spirit, it's going to agree with the Word of God. True teaching produce liberty not bondage.
Some people stop right here and take the wrong liberty.
Ministers and teachers should produce liberty not Bondage. This error is often seen in the selfish nature of leaders in getting their way at all cost. No matter the cost to fellowship. These people often produce an atmosphere in which there is competition and not cooperation for the Lord's work. The leader who becomes dogmatic, He's gone to far.