I suppose I'm not sure what you mean. Do you think banned users are still able to make posts? This is not the case; banned means all their priveleges of use are revoked. Any posts by a user in black are ones made before being banned.
"The devil I'll bring you," answered Hagen. "I have enough to carry with my shield and breastplate; my helm is bright, the sword is in my hand, therefore I bring you naught."