Thanks for the feedback.
I've been looking for a Simple Machines forum version of this idea, which I've seen elsewhere. I found one, but it didn't really have a lot of features:
http://wiki.simplemachines.org/smf/WarningIt does allow, however, for something less upsetting than a ban -- if a user receives too many warning points, their posts could be approved by a moderator before posting.
http://www.vbulletin.org/forum/showthread.php?t=71992 -- This is vBulletin's Advanced Warning System (AWS). Some features.
In that case, this warning system, allows you to issue a warning to the member who commited the offence. The warning has some points associated with it, as well as a period over which it is valid. When a member gathers enough points, he is banned from your forums, for a predefined period of time. That's mostly it, but below, you can find a short list of features:
Full warning system with:
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- post- and non-post-related warnings
- hierarchical warning schema
- hidden or real warners
- customizable maximum warning points
- automatically bans members who reached the maximum warning points
- customizable ban days
- customizable ban user group and permanent ban user group
- customizable restore user group, where users are restored after they get unbanned
- customizable option for who can see the warning level of the members
- automatically issued warnings for posts which contain censored words
- automatically issued warnings for private messages which contain censored words
- supports incremental banning periods
- supports multiple warnings for the same post
- warned members are notified either by Private Message or e-mail when they are warned and when one of the warnings they have received is either deleted or expired
- maintains historical listings of issued warnings (even if deleted or expired)
- customizable warning types
- each warning type has predefined warning points associated with it
- each warning type has predefined maturity period, after which it is automatically deleted
- reports for admin, mods and members
- cron job included to automatically remove matured warnings
- uses vBulletin's cron job, to automatically unban banned users
- all options are setable in your AdminCP
- user warning points and number of bans viewable in your AdminCP User Manager.
- statistics show warning per type, warnings per warner, bans per user.
- Allows you to warn a user from your AdminCP/User Manager.
- Large "Warn" sign, in posts which have received a warning, for mods, supermods and admins, to easily distinguish those posts.
- Ability to remove user's avatar, signature or usage of the Private Messaging system, depending on the warning points he has collected.
- Supports non-standard admins, supermods and mods user groups.
- Allows you to save a copy of the warning send to the warned user, in a predefined forum.
- Allows you to issue "Alerts" (warnings without warning points, for first-time offenders)
- Allows you to add private or public notes for a user, either post-specific or not. Notes appear in the postbit, above each user's message.
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That's the system I think would really work -- make it easier for mod, users, everyone to see the writing on the wall, full transparency.