TBH, typically we know pretty quickly, and often give people some slack to see if they can handle acting like an adult. There are a lot of tools, plus an experienced staff with some solid intuition and recall for Soxtalk history. Some people are gone for good, some people get an extra chance here or there. It kind of depends on the history, and how long it has been, plus the mood of whoever is doing account approvals at that time. Once they fall back into the things that got them banned in the first place, they are gone quickly.