I believe he meant people who say they are Christians but do not live it, i.e., hypocrites. Like the Pharisees of the New Testament. Why did you post this in cults?

If you dwell in bad company, you can pick up their influences.

I dont believe you have this in context. What scripture are you referring to? I believe we all fall short of Gods expection. Thats why Jesus (aka Michael for JWs) died for us and we are all sinners. How would an immoral person be led to Christ if you could not associate with them.

They wanted to keep the congregation clean. Once you know the truth, you are accountable. 1Cor 5:9-12 In my letter I wrote YOU to quit mixing in company with fornicators, 10 not [meaning] entirely with the fornicators of this world or the greedy persons and extortioners or idolaters. Otherwise, YOU would actually have to get out of the world. 11 But now I am writing YOU to quit mixing in company with anyone called a brother that is a fornicator or a greedy person or an idolater or a reviler or a drunkard or an extortioner, not even eating with such a man. 12 For what do I have to do with judging those outside? Do YOU not judge those inside, 13 while God judges those outside? “Remove the wicked [man] from among yourselves Jude 3-4 Beloved ones, though I was making every effort to write YOU about the salvation we hold in common, I found it necessary to write YOU to exhort YOU to put up a hard fight for the faith that was once for all time delivered to the holy ones. 4 My reason is that certain men have slipped in who have long ago been appointed by the Scriptures to this judgment, ungodly men, turning the undeserved kindness of our God into an excuse for loose conduct and proving false to our only Owner and Lord, Jesus Christ Hebrews 10:26 For if we practice sin willfully after having received the accurate knowledge of the truth, there is no longer any sacrifice for sins left James 4:17 Therefore, if one knows how to do what is right and yet does not do it, it is a sin for him.