Is "churching" someone really a Christian practice?

I hear a lot of reasons why people don't attend church, and some of them are valid reasons. I hear some talk about how organized religion is something they don't need because of one reason or another. Most of the reasons come from a wrong, or perceived wrong that they or someone they know experienced. In today's political climate, the conservative movement has fashioned Christianity into something grossly distorted to the point of almost being unrecognizable. One of the most reprehensible practices that some religious orders still have today is "Churching" someone, or asking them to no longer attend church. That policy is based on scripture according to them, usually Matthew 18: 15-17  ¹⁵ “If your brother or sister sins, go and point out their fault, just between the two of you. If they listen to you, you have won them over. ¹⁶ But if they will not listen, take one or two others along, so that ‘every matter may be established by the testimony of two or three witnesses.¹⁷ If they still refuse to listen, tell it to the church; and if they refuse to listen even to the church, treat them as you would a pagan or a tax collector."  For some reason, some religions take this to mean that the offending person should be ostracized from the congregation. I'm not sure how they make this leap of logic, when Christ repeatedly talks about bringing pagan's and tax collectors into his fold. To  me He is saying to treat that person as someone who just hasn't quiet understood what it means to live as a Christian, and to work towards reconciliation. My other thought is that he is instructing His disciples to not give up on anyone, and sometimes they may need to start from square one, and revisit the situation. Today there seems to be more exclusion of people than inclusion when it comes to being accepted as a person of faith, which is exactly opposite of Christ's teachings. If someone doesn't agree with your theology, I've found that to be the best time for me to learn more deeply what it is exactly that I believe and why. Don't be quick to cut someone off because their understanding is different from yours, and always remember the "Greatest Commandment" Matthew 22: 37-44 "Love the Lord your God with all your heart and with all your soul and with all your mind ³⁸ This is the first and greatest commandment. ³⁹ And the second is like it: ‘Love your neighbor as yourself.’^[d] 40 All the Law and the Prophets hang on these two commandments.” I don't see anything about excluding anyone, or asking them to never come back to your congregation.