Not to open a can of worms, but this is incorrect. Often times if contacted something can be worked out.(Unless the offense was over the top). But we are rarely contacted. Instead, people try to "sneak" back on rather than try and work something out. They are almost always caught.
Also, someone is rarely booted without warning unless it is an egregious offense (spamming, abuse of staff, racial comments, etc). There is always a "ramp up" period where they get repeated warnings before the hammer drops. If they choose to ignore the warnings, well...............
Keep in mind, you are hearing only one side of the story. That is all you will ever hear, though, since we will not discuss action taken except with the member it is taken against.