The only problem with banning an IP address though is that other users from that IP address will be unfairly banned too. My hubby and I both use AB , as do my sister and friend when visiting , so if they posted something which got them banned or overposted , resulting in a ban , then I would be banned too. It seems a bit unfair to block access for ALL users of that IP address.
Sadly , some users seem to have more aliases than i've had hot dinners but I am sure that this will be obvious to the AB ED due to how many times they must log in and out under various guises and I don't doubt that some of these said users use their various names to wreak havoc , banning posts and making snide remarks to other ABers. I'm not quite sure what the answer is to that problem.