Blame AOL... or rather... blame the way AOL does IP addressing.
AOL has a few million members... but does not have a few million IP addresses... they probably have ~100,000 IP addresses. As such, only that many people can log onto AOL at one time. 
When you log onto AOL, they give you a 'temporary' IP address. When you log off.. you IP address goes back into the dynamic pool. The next time someone logs on, they may get your IP address.  
As such, if your IP gets banned, that doesn't mean you're banned.. just that IP.  And if someone else gets unlucky to get your IP, they cannot log onto the forums. And you could possibly get back on, because you have another IP.
Unless AOL happens to get enough IP addresses for each of its memebers, there's no way AOL's gonna be lifted.