Okay, I read the all comments and opinion, so I will leave my response to everyone who took the time to share their opinion so far here....
First, although a sigban does not prevent the user from posting on the forum, it can cause not only financial loss, but also to loss your reputation, so a subjective decision made by a single person (again, I do not want to judge her work) should allow for a quick review BEFORE producing consequences that are difficult to revert.
In the other hand, I recognize that reversals is rare... but as I said before, I do not had idea how often this happened. The fact that the user could appeal within a mandatory timeframe would increase the workload of reanalysis within that same timeframe and allow the offender to temporarily improve their behavior improperly just to avoid the punishment.... I considered this argument to be quite strong.
I think it would then be possible to implement a middle ground: a sigban immediate to obvious cases of serious spam... use of AI, plagiarism and repeat offenses... its ok!!!
And maybe a private warning by PM for borderline cases and perhaps an additional review for long bans of users with a relevant history of good posts over a long period of time!?
I think really made a mistake by proposing a "universal" seven-day grace period, but I really ask you to see my motivation behind it: Even if it is only 2% or 5%, we are talking about a decision that can not only cause the loss of participation in a campaign, but sometimes the loss of the only income the person may have, with the impossibility of recovering the spot later, not to mention the reputation that is damaged.
Anyway... I know there is no defined regulation or procedure for how to act, but perhaps this would be a case for creating a possibility of prior defense for certain cases, we c anot always "hit first and then ask if he is guilty".
OP did you really had to create new account, and create another topic about sigbans?

Even if your provocation is a joke, but I will answer you objectively:
This is my only account, I no have reason to hide anything or ask anything in secret, I have not even made another post about this subject.