The govt is in a tough position on the mercury issue. It is kind of like Kraft eliminating high fructose corn syrup from some of their products - they can't advertise it, because that then calls into question the other products that still have it. The govt has taken an "Its safe" position on several sources of mercury, and if they come out to educate the public about mercury in lightbulbs, they call into question the "safe" sources of mercury that they don't ban/regulate.
I hate that global warming or the lack thereof has become the defining issue in environmental policy. There are a hundred good reasons to conserve energy, most of which have little or nothing to do with climate change. Even if you discount climate change/global warming entirely, you have issues with an aging grid, existing power-generation sources incapable of meeting ever-increasing demand, local pollution and quality-of-life issues regarding coal fired power plants, waste disposal issues regarding nuclear plants, questions about the future supply of the fossil fuels we need to maintain the status quo (not to mention the safety/human cost of getting those materials), etc. I'm not a "true believer" in climate change by any stretch of the imagination, but to me the verdict on that one issue is still out and largely irrelevant. There are other, better, more certain reasons to move towards more responsible energy use.