I could not agree more. I don't believe anyone thinks we have either the experimental data or theory to predict climate change with precision and there undoubtedly (see Kuhn's book) will be many incremental and perhaps revolutionary changes in macro climate concepts as "science moves forward" on this topic. The practical matter for those of us who are not on the cutting edge of climate science is when and how to act on existing best knowledge and understanding to avoid making matters worse. As the preponderance of evidence and interpretations by legitimate scientists and science bodies clearly makes man's contribution at the very least possible and more likely probable, then how do we act with that information.
If you see smoke rising from a home a block or two away (a farm or two away for you country boys), is it reasonable to sit and argue over whether it looks more like BBQ or a house fire? Or, would it be more reasonable to acknowledge the possibility of a house fire and consequences of delay in taking action? What is the downside of interrupting your porch argument, grabbing some tools and fire suppression materials and jumping in the truck or running over to the neighbors house ready for action? Would you really say that it is better to sit and wait for more data or argue about whether a slight odor you detect is burning pig or plastic? I strongly suspect that in such a scenario virtually all of us, libs and wingnuts together, would head out to see what was happening and be prepared to intervene. Considering the "cost" of not intervening early should clearly be part of the equation. Likewise, the cost of over reaction needs to be considered. It is not reasonable to get out your bulldozer and demolish a fire break through the neighborhood before you understand there is a real nightmare fire rather than delicious ribs on the grill. Based on that analogy I would certainly say it is time to get off the porch and prepare for action and clearly not time to get out the bulldozer. We don't need to ban fossil fuel cars etc but we might very reasonably insist that MPG standards double over ten years and that we look into alternative modes of transport and sources of energy. Why would anyone want to resist such preparations? If we end up cutting the use of fossil fuels over ten years, great, more left in the ground for my great grandchildren. Less money on imported fuel. NASA like benefits of investing in a long term technological search for better ways. Did every step NASA took to get us into space work as planned? Is that a reason not to take risks with solar, wind, tide etc alternatives? Some argue that it would hurt our economy. Baloney. Germany has a very strong economy and they are much more aggressive in use of alternative energy and policies to limit fossil fuels than we are. Time to pull our heads out of the sand and consider how to move forward rather than just sit around defending energy practices that we know, even without further climate data, are wasteful and harmful to all but a relatively few who work in the fossil fuel industry.
Wouldn't it be nice to find out the smoke is just a big BBQ? What do we lose by preparing and taking actions to put out a house fire just in case?