1 Corinthians 6:8

‘No, but you yourselves do wrong and defraud your brothers.'

But even worse than the bad witness of Christian brothers falling out is that in fact some of them are actually using the law to defraud their brothers. They have become extortioners. They have learned to use the law to their own ends. And we must always remember that what is legally right in a worldly court might not be morally right. Thus they are behaving unjustly. They are using pagan courts to get their own way, often unfairly, against Christian brothers. This can only bring them into condemnation. In such cases they win the case before men but lose it before God. And God loses as well.

It is very probable that Paul had good knowledge of some of these court actions conveyed to him by his visitors. And this may have affected what he put in his lists, coveting and greed, extortion and cheating, reviling and destroying men's characters, and so on. And all before unbelievers. Shameful.