<p>If the answers are just <em>wrong</em>, you can downvote them. If they are unrelated, you can flag them for moderator review. (Not-an-answer answers appear to get vaporised very quickly, <em>once someone finds them</em>.)</p>

<p>Check the <a href="http://stackoverflow.com/unanswered">Unanswered</a> display -- it shows both questions with no answers and questions without up-voted answers. I don't know how many users actively read this query versus the main [Questions] query, but hopefully it is enough to help garner new answers among users not in the <a href="http://meta.stackexchange.com/questions/9731/fastest-gun-in-the-west-problem">The Fastest Gun In The West club</a>.</p>