Board Thread:General Discussion/@comment-5313287-20140622032734/@comment-20644-20140625194848

Yes, people can change their IPs and accounts to post a comment on the thread, but the difference is that those are logged. You know what the IPs and accounts are. If the IP ranges were the same, you could deduce it's likely the same person. Accounts can have their IPs looked up by Wikia Staff (if necessary). And so forth. The difference between posting and a poll is a measure of accountability, which polls don't offer.

As for community messages - sure, or you could highlight the thread.