In regard to your querry there is no such forum is available.
Further, you can black list a person from your angle of thought and feeling and ban his entry to any of your subsidiaries or sister concern establishments. But you can not bind others to follow your dictation and this will create lot of legal issues. The act of balck listing is the work of judiciary still they can not. This only can be possible if there is provision is exist for prononouncement or otherwise no.