I'd guess that a large percentage of people who buy CFLs are totally unaware of how to deal with these hazards (or are even unaware that the bulbs contain poisonous material).
Also, the rise in the use of CFLs means that more people will be exposed to mercury while mining it and while assembling the lamps (probably in places like China, where occupational health laws are fairly lax).
Also consider that in today's litigious world, no one wants to say "don't worry if you break a bulb, there's not really enough mercury to be dangerous in one" lest someone starts breaking bulbs with wild abandon and then suing the authority that told them they 'weren't dangerous'.
There's some interesting discussion on this topic here: http://skeptics.stackexchange.com/questions/297/how-dangerou...
People that support these things are not really all that clued in.
There are many levels of fail.
I've seen local ordinances that in effect mandate the incorrect usage of CFLs. As such, a fixture at my mom's house results in a burned out (due to overheating) CFL about once every 6 months.