$automated_forum_moderation_data = array(
	'max_days' => 30, // Maximum time since the last post in a topic to allow posting
	'allow_double_post' => false, // Allow posting twice (false, true, or an array of forum IDs to allow it in)
	'allow_double_post_after' => 60, //the number of minutes since the previous post by that user (if the user is the last poster on a topic) that a new post can be made.  false if not applicable
	'min_words' => 2, // Minimum words in a post
	'min_chars' => 5 // Minimum characters in a post
);

You're just checking for the common posting habits found in bad users. Doubleposting and too few words/characters. I'm not sure too few words will help much, and the time since last post seems an odd choice. Sometimes users are infrequent guests. it's interesting logic, though! :)