@delayedinsanity: Yes, I allow guest to post, but one category which guests can post, and twice in a week.

I think the spammers are smart. When I enable guest post to the category, 30 minutes later, spams will appear.

I turn off user registration and modify some code lines to prevent spammers type URL as GET / submit registration form from and offline HTML file(s).

I am very tired of struggle against spammers. Does Mollom support phpBB?

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