One of the people who I greatly admire is Dr. Paul Krugman - he is an economist who has demonstrated a level of integrity and intellectual honesty that is rarely found. Furthermore, he's been brave enough to go beyond being an academic and has worked tirelessly to criticize bad public policy in a way that is widely accessible.
We need more Krugmans in this world. We need more people who really think about things, who can really identify problems and analyze them, and who are brave enough to voice their thoughts to the wider world. We need more thoughtful dissenters who refuse to go with the flow when evidence says that there's something wrong.
So when you see a Krugman - be thankful for the work that they do. It's not easy work, saying what doesn't want to be heard but needs to be said. They identify the problems and make solving those problems possible - and that work is immensely valuable and does affect change. Support the Krugman's you know, and encourage them. Without them our world would be a much lesser place.