Well if we are to accept that Paul was inspired when the wrote these words,
(1 Corinthians 5:9-13) 9 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.”
then we would have to act in accord with this. This seems to me to be a direction from Paul rather than simply a suggestion. How should we apply this today? There needs to be some benchmark for behaviour in the congregation, and after careful consideration and scriptural reflection, the body of elders would be in a position to make a call on this. Otherwise, this could descend into individual preference, which could be coloured by family or other issues, rather than basing it on scripture.