That would probably leave more than a few people angry, and I'd hope that they all would then file complaints with the FCC. This would essentially be treating a regular telephone number differently and blocking access/charging "additional money" for accessing it-- something that the FCC might not look too kindly on.
If they would have a few thousand complaints generated over it, at least that would keep their complaint response people busy for a day or two. If they treat you unfairly, the least you can do is make an effort to cost them some extra money that they hadn't planned on spending. -- Nobel peace prize for Obammer... Now he's got one more thing in common with Arafat besides hating America. And he's just as succesful as Jimmy "the failure" Carter.
reply to NOVA_Guy I hear what you are saying and I agree that it wouldn't be fair but I don't think there would be any ground to complain to the FCC. If they didn't allow it in your A-list, they would simply be charging the same as any number not in your A-list. One could certainly try an FCC complaint but the only thing they are potentially violating is their own contract with you. They aren't prohibiting the call and they aren't charging you a premium above any other number. They just aren't giving you the A-list discount.
If they treat you unfairly, the least you can do is make an effort to cost them some extra money that they hadn't planned on spending. 