TEST THEM: Believe not every spirit, but test the spirits, whether they be of God; because many false prophets are gone out into the world. (I John 4: 1)
MARK AND AVOID THEM: Mark them which cause divisions and offenses contrary to the doctrine which ye have learned; and avoid them. (Rom. 16:17)
REBUKE THEM: Wherefore rebuke them sharply, that they may be sound in the faith. (Titus 1: 13)
HAVE NO FELLOWSHIP WITH THEM: Have no fellowship with the unfruitful works of darkness, but rather reprove them. (Ephesians 5:11)
WITHDRAW FROM THEM: We command you, brethren, in the name of the Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which ye received of us. (II Thes. 3:6)
TURN AWAY FROM THEM: Having a form of godliness, but denying the power thereof: from such turn away. (2 Timothy 3:5)
SEPARATE FROM THEM: Come out from among them, and be ye separate and touch no the unclean thing. (II Cor. 6:17)
Although not every context of these passages deal specifically with those who lead, there doesn't seem to be any prohibition from applying them to church leaders. I think I've done each of these in relation to church leaders.