While the goal is admirable turning on IP address monitoring will do little. Most people get a new IP address every time they login, and if you use a large ISP like AT&T or IBM, getting them to track down who was on a particular IP at a particular time normally requires a court order -- abusing a bulletin board is not going to get their attention.
Not to mention the dozens of free internet services that require nearly no real information to get access to the Internet, and to track them back would require looking up the inbound phone number, no easy task, and then getting the phone company to tell you who has that number if its unlisted (court order required).
If people are fed up then I too support partial moderation -- create new copies of the current boards for people who want moderation to participate in, and let us 'commoners' jibber jabber among the regular bulletin boards.