At one point, JWs actually seemed to wished they could kill disfellowshipped ones.
***
w52 11/15 p. 703 Questions from Readers ***We are not living today among theocratic nations where such members of our fleshly family relationship could be exterminated for apostasy from God and his theocratic organization, as was possible and was ordered in the nation of Israel in the wilderness of Sinai and in the land of Palestine. "Thou shalt surely kill him; thy hand shall be first upon him to put him to death, and afterwards the hand of all the people. And thou shalt stone him to death with stones, because he hath sought to draw thee away from Jehovah thy God, . . . And all Israel shall hear, and fear, and shall do no more any such wickedness as this is in the midst of thee."—Deut. 13:6-11, AS.
Being limited by the laws of the worldly nation in which we live and also by the laws of God through Jesus Christ, we can take action against apostates only to a certain extent, that is, consistent with both sets of laws. The law of the land and God’s law through Christ forbid us to kill apostates, even though they be members of our own flesh-and-blood family relationship.
Hmmm - Parents are cautioned about taking in ill children who've left home, then been disfellowshipped:
So if a child might bring "leaven" into the home, they might just be on their own - with uncertain (and probably unhappy) consequences.***
w81 9/15 p. 29 If a Relative Is Disfellowshiped . . . ***16
This could be true also with regard to a child who had left home but is now disfellowshiped or disassociated. Sometimes Christian parents have accepted back into the home for a time a disfellowshiped child who has become physically or emotionally ill. But in each case the parents can weigh the individual circumstances. Has a disfellowshiped son lived on his own, and is he now unable to do so? Or does he want to move back primarily because it would be an easier life? What about his morals and attitude? Will he bring "leaven" into the home?—Gal. 5:9.17
In Jesus’ parable of the prodigal son, the father ran to meet and then accepted his returning son. The father, seeing the lad’s pitiful condition, responded with natural parental concern. We can note, though, that the son did not bring home harlots or come with a disposition to continue his sinful life in his father’s home. No, he expressed heartfelt repentance and evidently was determined to return to living a clean life.—Luke 15:11-32.