Board Thread:Support Requests - Community Management/@comment-1762932-20130212102325/@comment-168424-20130212174252

There is no definitive answer to this question. It depends on the wiki, their community, and their admins. If the community agrees to this policy, you can do it.

In reference to the specific question, I don't see how you could sockpuppet on chat without sockpuppeting in general. As a recommendation, I would block a user for a short time (1 week or around that) for abusing chat, but with increasing times (along with a warning on their message wall/talk page) if they continue to offend.