On our forum we often have trouble makers that register, flame, bait, troll etc and ultimately get banned. They then re-register and the process goes around and around.
So far most of these users are coming from AOL and when I validate their signup IP I get many legitimate members as well.
I know this is due to AOL caching/Proxy and I'd like to force the user, at least on the signup/login portion to not allow the AOL proxy/cache to be used.
Information about AOL Proxy
here. Is it possible to do this with UBB? I notice that AOL's cache/proxy servers do not read HTML so it isn't a simple matter of putting a bit of META tag in the headers.