Evidence that you are doing something right in the climate change debate often comes from the denial reaction. Most of the times, messages on climate change are simply ignored but, occasionally, the reaction is strong; sometimes rabid. Then, you must have hit a sensitive point!
The publication of the Hockey Stick curve almost served as an exclamation point. It occurred in the wake of the warmest year we’d ever seen in recorded history, 1998. But that recorded history only went back a century or so. We were able to provide a longer term context. The curve told a simple story. You didn’t need to understand the physics or mathematics of how a theoretical climate model works to understand what it was telling you.