Energy saver bulbs? Those spirally fluorescent ones? Yeah, so you're saving some energy but endangering everyone with mercury. Cool.
My father, who's an analytical chemist, told me that the really only dangerous or toxic form of mercury was what fish digested. He told me the reason, I will try to get it exactly how he said..
He said that the mercury fish digest broke down a little, and bonded with a sulfate in the fishes stomach. He said that mercury sulfate has a low LD50, and that you don't only have to digest it to die, you can also inhale it.
He said other that that type of mercury, it's not too bad.