@scaaahu noticed in the Ivory Tower chat that https://academia.stackexchange.com/users/91603/d-hutchinson?tab=profile has been banned for 28 years. Incredible! I took a look at D.Hutchinson's posts at academia.SE and found nothing bad. Really nothing. I might be missing something, but which kind of offense would lead to such a long ban? In practical terms, this is "forever". The way we know the stackexchange site today, it need not even exist for such a long time span. Some of us might even be happily pushing up the daisies by then.
What I could imagine is that the user might be way too young to discuss academic issues, say, 5 years old. Then, about 20 years might make sense.