One other statistic you can look at is Accuracy vs number of posts... Someone with a high accuracy number, relative to the number of posts, tends to give out a lot of good advice.
The scary ones have few postings, but a strongly red accuracy rating... Just about everything the post is disagreed with.
On the flip side, remember that Einstein had a 100 of the top scientists of the day slam him, when he published his theory of relativity. The crowd is usually right, but not always.