Sorry. The administrator has banned your IP address

[Alfa1]

This is a common thing that has to do with like providers like AOL, which use a very strange way of handling proxies /IP's. When you IP block one AOL IP, (no matter if a IP WHOIS says it's non-portable) you will block a *lot* of other AOL users as well. You need to unblock all AOL IP's to get rid of that problem for the user that complained recently. Comcast is another provider that can give these kind of proxy troubles. Other than that; trace all IP's before you decide wether or not to block them. Make sure that you do not block portable IP's.