Hey 45acp, my dadinlaw and HIS dad both were plumbing, heating, and electircians for YEARS and they used to install furnaces by taking aesbestos in buckets, dumping water in it, and smearing it all over the furnace for insulation. dadinlaw is 65 or so, his dad is close to 90 and still running about! Oh, and I was hanging out with the folks at Northeast Bullet Company at their old shop and wondered about the whole lead thing, as well as I asked a guy who made fishing weights. It seems that unless the lead is vaporized, it is not going to be breathed in. And the bullet people had lead all over their hands and stuff, well, it may have been moly from the moly tumblers, but still, they were holed up in a basement shop making millions of bullets!! They were fine.
Now this is not to say you should not be smart about things, but don't freak out and install a $10k HEPA filtration system or anything! Just be smart and do things that make you feel comfortable. I only use my air cleaner in my shop when I am milling mahogany, walnut, and some other exotics. Other than those, domestic hardwoods don't hang in the air and my dust collector picks it all up.