You might try looking for controversy. I've thought about this more for reddit/slashdot comments than for polls, but here are my ideas: For comments on a point

You might try looking for controversy. I've thought about this more for reddit/slashdot comments than for polls, but here are my ideas: For comments on a point based site (such as reddit, this site if it gets popular), there are signs that a post is being downmodded by people who disagree. For instance, -10 points, 10 replies. Or 10 upmods, 12 downmods. In your case, this would probably be 10 "innappropriates", and another 20-30 people actually using the poll. You might also look for people clicking "innappropriate" and then voting in the poll.