Last modified: 2005-12-14 23:45:45 UTC
It would be great if the ip address was saved with each edit that a user made. That way if I had a problem I could easily look back in time and with the help of an isp, track down a user that didn't provide a real name or email address. Additionally, the ip would show up on recent changes for a user if viewed by a sysop. I think recording this type of information on a per edit basis will be more an more important vis-a-vis new potential liability concerns for wiki owners/admins.
The functionality already exist, turn on IP logging on your wiki
That is, set $wgPutIPinRC = true; in LocalSettings.php. See http://www.mediawiki.org/wiki/Help:Configuration_settings#Recent_changes for more info.
Thanks!