It would take thousands and thousands of these bulbs to get enough mercury to equal that in a small thermometer. So that part doesn't bother me ... they just don't last long like they're supposed to.
That’s where you’re wrong, it goes airborne and you breath it in, read the instructions on what do if one breaks, you have to remove your carpet, never vacume it, leave the home, for days, to be honest, in most cases you need to contact a hazmat team, if you don’t believe me I can post the official guidelines.
I have about 1/2 a fl oz of mercury out in the garage, in a set of carburetor balancing gauges (mercury “carb stix”). Now, if I was to spill all of that on the floor I might worry a bit. More likely I’d just sweep it all out the door. They don’t come indoors, though. When I want to get rid of it I’ll have to take it the toxic waste recycling center, I guess.