Just going back to the original topic here. If you have converted from vbulletin and these members were banned on vbulletin, you should see they are already banned on our system. If they are not, we would need to take a look at that so you should submit a ticket.
As mentioned above, banned and validation are actually statuses of a member rather than groups. You can see in the member section of your admin CP who is banned and who is validating using the lists provided. Also, if you open any member in the admin CP, it will tell you at the top if they are validating or banned