Ahh, me soapbox is a bit dusty, 'n what's a Monday Morning without a little DOOM?
WOOD TOXICITY IS NO LAUGHING MATTER
Wood dust is a rapidly increasing cause of disability, COPD, death... But, it's not so much the poison-ness* of specific woods, as it is the size of the particles. And that, in turn, is a result of modern science.... if you looked around a cabinet shop or guitar luthier or custom woodworker of any sort 100 years ago, even 50 years ago, even 25 (?) - you would see a WHOLE BUNCH of chisels, spokeshaves, knives and adzes and saws and such - sandpaper was the very last thing only. However, because of advances in making and sizing particulates, and even more so, better glue - everybody's sanding off what they used to slice. And, it turns out that "black lung disease" and "asbestosis" and such have little to do with coal or asbestos being bad for you - it's the size of the particle that matters.
That ultra-fine dust you see gathered on your drill press or work table - hey, no problem! Snort it up, your lungs will mucus it up and eject it. BUT THERE'S A FINER DUST YOU CAN'T EVEN SEE - it's floating in the air. And when it gets in your lungs - doesn't matter if it's wood, coal, asbestos, fiberglass - your lungs will "encapsulate" it, but it won't cough out. On some woodworking site, I read that 25% of all woodworking professionals are now "retiring" due to disability? And this is all just coming up NOW, because of the wholesale move away from carving wood to sanding it down. The more responsible shops are treating this with utmost seriousness, if you look through your tool catalogs at all the vacuum apparatus, that's what they're doing.
NOW THAT YOU'RE ALL TERRIFIED:
Personally, I don't think that banging out a guitar every once in a while can hurt you, you could probably snort up all your wood dust intentionally if you're doing even a few guitars a month - it's the big guys, day-in, day-out sucking it up for 40 hours a week that are kaaking, and there are going to be a LOT of third-worlders dying from this for sure because they don't have ANY protection (and they work 400 hours a week). It's all a matter of degree. I think wiping off a sanding project with a damp towel every once in a while is probably a good idea, but the only thing WE have to fear is fear itself. If I WORKED at Warmoth, I would be careful, that's all. As they are - they won't even fiddle with cocobolo.
And the "toxic" woods really do behave as any allergen, the trick with them is that you never, ever had any likelihood of developing a resistance to them, UNLESS you grew up in a South American jungle and chewed on a lot of bark. In which case you're a scary person, and I don't even want to know...
*(F U, spell check)