Honestly, among the four major families, the Leng family had the best reputation, because every member of the Leng family was stopping disciplinary violations, including Leng Shaoting.
If it wasn't serious, a warning would be enough. If they were willing to change, the Leng family would still accept them. However, if it was serious, they could be secretly killed. After all, it was an effective way to punish someone as a warning to others.
However, in reality, no matter how strict the Leng family were, they couldn't stop bad people from doing bad deeds. There were still problems with people who belonged to the same faction as the Leng family.
In addition, no one was perfect. Perhaps they made mistakes in some aspects, but they were quite useful in other aspects. As long as they didn't hurt the Leng family's interests, they would turn a blind eye.
The Leng family would only limit their behavior and prevent them from causing serious trouble.