Irl if you "ban" something, like cigarettes, then it does not necessarily imply forever but it does sorta imply until the law is changed i.e. until further notice.
So then if you ban a person for a period of one week, the timeline needs to be delivered alongside the word - "banned for a week".
Which the OP did not do, and moreover (I am not sure if the post was edited or was always this way), seems to go out of its way to imply a permanent banning? Though the phrasing used was "cancels" rather than bans.
Well, perhaps it's a language issue, but this OP is also quite sensationalistic, so my fault I suppose for engaging with what is clearly an emotional rant rather than a piece of any substance (again, regardless of whether the original subject is true or not, I am saying that this post does a poor job describing what occurred).