On Tue, Dec 21, 2004 at 05:50:43AM +0000, Angela wrote:

There isn't really any policy on this yet. It might be best to discuss creating one on the English Wikipedia mailing list (wikien-l) or making a page about it on the wiki.

The most relevant policy so far is http://meta.wikimedia.org/wiki/Privacy_policy but that is moving away from giving specific details on sockpuppet policy, so that each language wiki can decide this for themselves, rather than being a global policy.

Actually, that page seems reasonably strict and leave fairly little wriggling space for purposes of checking whether 3RR has been violated or someone is voting double. Still, it is an answer to my question, so thanks!