Suggestion: Have a mechanism whereby anonymous IP edits can be reattributed to an editor who is editing from that same IP, within some timespan (eg, an hour).
Rationale: It's easy to accidentally edit while logged out, and to leave a permanent trace of your IP on the public record. For example, if you create an interwiki link from wiki A to wiki B (with your login name), then on wiki B back to wiki A (forgetting to log in), it's trivial to work out that the IP on wiki B corresponds to the username on wiki A. And there's nothing you can do about it.
Making it possible to reattribute these anonymous edits will/may/could ideally:
- Help people who are particularly concerned about their IP being public
- Reduce the disincentive to working outside one's home wiki