I am not quite sure what you want to say with this? Yes, mercury in cfl is not very pleasant and you might have a (small) possibility of a direct exposure to mercury. And yes, there are many other sources of heavy metals beside batteries.
Nevertheless, most batteries contain substantial amounts of heavy metals. Cadmium, mercury, lead, zink, ... just a few of them. In many landfills they contribute substantially to the heavy metal content. Not quite sure how happy you would be, if these metals are present in your family's drinking water or in the fish you find on your table. Especially mercury in landfills is of concern, because it gets converted into methylmercury - a form that is very easy adsorbed by organisms and therefore bioacumulates easily.
It is just silly not to recycle all the ressources contained in batteries. They are easy to collect them at home and in most civilised places easy to bring back to a collection site. For most of us this is just a matter of doing the right thing.
I only can guess the content of the article, but it looks like it sais exactly that: Recycle the dang little buggers. There are only benefits doing it.