I get how as a scientist watching things you want to push people to action. That being said, James Hansen has gone a little overboard IMHO and into the realm of damaging the credibility of scientists in general be politicizing things himself. He's written things like:
Mountain glaciers, providing fresh water for rivers that supply hundreds of millions of people, will disappear - practically all of the glaciers could be gone within 50 years
This despite the IPCC estimates that gain/loss in glaciers will be regionally dependant on precipitation changes(and this based on admittedly poorly modelled precipitation).
The trains carrying coal to power plants are death trains. Coal-fired power plants are factories of death.
This isn't precisely a statement backed by peer reviewed evidence either...
When people are angry about the science being politicized, it does NOT help for the scientists to go over board politicizing things themselves in the hope of being a counter-balance. It doesn't work between FOX and MSNBC counter balancing each other from Rep-Dem sides of things, and it doesn't work for educating people on the science either. You just get more and more grandiose hyperbole, half truths and flat out propaganda from both sides.