What happens is that the list of blacklisted IP addresses is constantly growning with every spamer we block ( up to 1000 or more )
Sooner or later innocent people get assigned those IPs from their Internet Service Provider, and when they come to curezone, server thinks it is the blocked spamer, and they get blocked without braking any rules.
The system works wonders against real spammers, but unfortunatlley, it is imperfect and often blocks innocent curezoners.
Will have to work more on that system and make it better.