Not necessarily, but unless our ban of them was mistaken, there was a reason to ban them. This was generally connected to their behavior on the project.
I see no reason why that behavior should not, in general, be documented and indeed searchable. I'm not in the business of enabling antisocial behavior by ensuring lack of consequences.
And if it were mistaken, one'd want it to be searchable such that the fact it was mistaken can be seen and corrected.
KTC